mirror of https://gitee.com/openkylin/linux.git
m68k/mac: Replace via-maciisi driver with via-cuda driver
Change the device probe test in the via-cuda.c driver so it will load on Egret-based machines too. Remove the now redundant via-maciisi.c driver. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Finn Thain
Michael Ellerman
parent
d23eee88b5
commit
f74faec6b3
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@ -38,7 +38,7 @@ struct mac_model
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#define MAC_ADB_NONE 0
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#define MAC_ADB_II 1
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#define MAC_ADB_IISI 2
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#define MAC_ADB_EGRET 2
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#define MAC_ADB_CUDA 3
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#define MAC_ADB_PB1 4
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#define MAC_ADB_PB2 5
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@ -286,7 +286,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_IISI,
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.name = "IIsi",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_OLD,
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.scc_type = MAC_SCC_II,
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@ -295,7 +295,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_IIVI,
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.name = "IIvi",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -304,7 +304,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_IIVX,
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.name = "IIvx",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -319,7 +319,7 @@ static struct mac_model mac_data_table[] = {
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{
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.ident = MAC_MODEL_CLII,
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.name = "Classic II",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -352,7 +352,7 @@ static struct mac_model mac_data_table[] = {
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{
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.ident = MAC_MODEL_LC,
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.name = "LC",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -361,7 +361,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_LCII,
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.name = "LC II",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -370,7 +370,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_LCIII,
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.name = "LC III",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -498,7 +498,7 @@ static struct mac_model mac_data_table[] = {
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{
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.ident = MAC_MODEL_P460,
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.name = "Performa 460",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -575,7 +575,7 @@ static struct mac_model mac_data_table[] = {
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}, {
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.ident = MAC_MODEL_P600,
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.name = "Performa 600",
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.adb_type = MAC_ADB_IISI,
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.adb_type = MAC_ADB_EGRET,
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.via_type = MAC_VIA_IICI,
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.scsi_type = MAC_SCSI_LC,
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.scc_type = MAC_SCC_II,
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@ -142,54 +142,6 @@ static void pmu_write_pram(int offset, __u8 data)
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#define pmu_write_pram NULL
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#endif
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#if 0 /* def CONFIG_ADB_MACIISI */
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extern int maciisi_request(struct adb_request *req,
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void (*done)(struct adb_request *), int nbytes, ...);
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static long maciisi_read_time(void)
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{
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struct adb_request req;
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long time;
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if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
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return 0;
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time = (req.reply[3] << 24) | (req.reply[4] << 16)
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| (req.reply[5] << 8) | req.reply[6];
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return time - RTC_OFFSET;
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}
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static void maciisi_write_time(long data)
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{
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struct adb_request req;
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data += RTC_OFFSET;
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maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
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(data >> 24) & 0xFF, (data >> 16) & 0xFF,
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(data >> 8) & 0xFF, data & 0xFF);
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}
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static __u8 maciisi_read_pram(int offset)
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{
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struct adb_request req;
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if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF))
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return 0;
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return req.reply[3];
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}
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static void maciisi_write_pram(int offset, __u8 data)
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{
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struct adb_request req;
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maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF, data);
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}
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#else
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#define maciisi_read_time() 0
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#define maciisi_write_time(n)
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#define maciisi_read_pram NULL
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#define maciisi_write_pram NULL
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#endif
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/*
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* VIA PRAM/RTC access routines
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*
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@ -458,11 +410,10 @@ void mac_pram_read(int offset, __u8 *buffer, int len)
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int i;
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switch(macintosh_config->adb_type) {
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case MAC_ADB_IISI:
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func = maciisi_read_pram; break;
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case MAC_ADB_PB1:
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case MAC_ADB_PB2:
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func = pmu_read_pram; break;
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case MAC_ADB_EGRET:
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case MAC_ADB_CUDA:
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func = cuda_read_pram; break;
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default:
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@ -481,11 +432,10 @@ void mac_pram_write(int offset, __u8 *buffer, int len)
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int i;
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switch(macintosh_config->adb_type) {
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case MAC_ADB_IISI:
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func = maciisi_write_pram; break;
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case MAC_ADB_PB1:
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case MAC_ADB_PB2:
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func = pmu_write_pram; break;
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case MAC_ADB_EGRET:
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case MAC_ADB_CUDA:
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func = cuda_write_pram; break;
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default:
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@ -500,17 +450,13 @@ void mac_pram_write(int offset, __u8 *buffer, int len)
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void mac_poweroff(void)
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{
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/*
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* MAC_ADB_IISI may need to be moved up here if it doesn't actually
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* work using the ADB packet method. --David Kilzer
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*/
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if (oss_present) {
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oss_shutdown();
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} else if (macintosh_config->adb_type == MAC_ADB_II) {
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via_shutdown();
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#ifdef CONFIG_ADB_CUDA
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} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
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} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
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macintosh_config->adb_type == MAC_ADB_CUDA) {
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cuda_shutdown();
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#endif
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#ifdef CONFIG_ADB_PMU68K
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@ -550,7 +496,8 @@ void mac_reset(void)
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local_irq_restore(flags);
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}
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#ifdef CONFIG_ADB_CUDA
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} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
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} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
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macintosh_config->adb_type == MAC_ADB_CUDA) {
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cuda_restart();
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#endif
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#ifdef CONFIG_ADB_PMU68K
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@ -699,13 +646,11 @@ int mac_hwclk(int op, struct rtc_time *t)
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case MAC_ADB_IOP:
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now = via_read_time();
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break;
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case MAC_ADB_IISI:
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now = maciisi_read_time();
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break;
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case MAC_ADB_PB1:
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case MAC_ADB_PB2:
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now = pmu_read_time();
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break;
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case MAC_ADB_EGRET:
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case MAC_ADB_CUDA:
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now = cuda_read_time();
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break;
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@ -737,6 +682,7 @@ int mac_hwclk(int op, struct rtc_time *t)
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case MAC_ADB_IOP:
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via_write_time(now);
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break;
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case MAC_ADB_EGRET:
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case MAC_ADB_CUDA:
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cuda_write_time(now);
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break;
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@ -744,8 +690,6 @@ int mac_hwclk(int op, struct rtc_time *t)
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case MAC_ADB_PB2:
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pmu_write_time(now);
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break;
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case MAC_ADB_IISI:
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maciisi_write_time(now);
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}
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}
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return 0;
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@ -30,14 +30,6 @@ config ADB_MACII
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Quadra 610, Quadra 650, Quadra 700, Quadra 800, Centris 610 and
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Centris 650.
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config ADB_MACIISI
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bool "Include Mac IIsi ADB driver"
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depends on ADB && MAC && BROKEN
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help
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Say Y here if want your kernel to support Macintosh systems that use
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the Mac IIsi style ADB. This includes the IIsi, IIvi, IIvx, Classic
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II, LC, LC II, LC III, Performa 460, and the Performa 600.
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config ADB_IOP
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bool "Include IOP (IIfx/Quadra 9x0) ADB driver"
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depends on ADB && MAC
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@ -60,17 +52,15 @@ config ADB_PMU68K
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# we want to change this to something like CONFIG_SYSCTRL_CUDA/PMU
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config ADB_CUDA
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bool "Support for CUDA based Macs and PowerMacs"
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bool "Support for Cuda/Egret based Macs and PowerMacs"
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depends on (ADB || PPC_PMAC) && !PPC_PMAC64
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help
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This provides support for CUDA based Macintosh and Power Macintosh
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systems. This includes many m68k based Macs (Color Classic, Mac TV,
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Performa 475, Performa 520, Performa 550, Performa 575,
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Performa 588, Quadra 605, Quadra 630, Quadra/Centris 660AV, and
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Quadra 840AV), most OldWorld PowerMacs, the first generation iMacs,
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the Blue&White G3 and the "Yikes" G4 (PCI Graphics). All later
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models should use CONFIG_ADB_PMU instead. It is safe to say Y here
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even if your machine doesn't have a CUDA.
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This provides support for Cuda/Egret based Macintosh and
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Power Macintosh systems. This includes most m68k based Macs,
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most Old World PowerMacs, the first generation iMacs, the
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Blue & White G3 and the "Yikes" G4 (PCI Graphics). All later
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models should use CONFIG_ADB_PMU instead. It is safe to say Y
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here even if your machine doesn't have a Cuda or Egret device.
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If unsure say Y.
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@ -20,7 +20,6 @@ obj-$(CONFIG_PMAC_SMU) += smu.o
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obj-$(CONFIG_ADB) += adb.o
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obj-$(CONFIG_ADB_MACII) += via-macii.o
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obj-$(CONFIG_ADB_MACIISI) += via-maciisi.o
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obj-$(CONFIG_ADB_IOP) += adb-iop.o
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obj-$(CONFIG_ADB_PMU68K) += via-pmu68k.o
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obj-$(CONFIG_ADB_MACIO) += macio-adb.o
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@ -48,7 +48,6 @@
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EXPORT_SYMBOL(adb_client_list);
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extern struct adb_driver via_macii_driver;
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extern struct adb_driver via_maciisi_driver;
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extern struct adb_driver via_cuda_driver;
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extern struct adb_driver adb_iop_driver;
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extern struct adb_driver via_pmu_driver;
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@ -59,9 +58,6 @@ static struct adb_driver *adb_driver_list[] = {
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#ifdef CONFIG_ADB_MACII
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&via_macii_driver,
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#endif
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#ifdef CONFIG_ADB_MACIISI
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&via_maciisi_driver,
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#endif
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#ifdef CONFIG_ADB_CUDA
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&via_cuda_driver,
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#endif
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@ -205,12 +205,13 @@ int __init find_via_cuda(void)
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struct adb_request req;
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int err;
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if (macintosh_config->adb_type != MAC_ADB_CUDA)
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if (macintosh_config->adb_type != MAC_ADB_CUDA &&
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macintosh_config->adb_type != MAC_ADB_EGRET)
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return 0;
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via = via1;
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cuda_state = idle;
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mcu_is_egret = false;
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mcu_is_egret = macintosh_config->adb_type == MAC_ADB_EGRET;
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err = cuda_init_via();
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if (err) {
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@ -323,7 +324,8 @@ cuda_probe(void)
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if (sys_ctrler != SYS_CTRLER_CUDA)
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return -ENODEV;
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#else
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if (macintosh_config->adb_type != MAC_ADB_CUDA)
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if (macintosh_config->adb_type != MAC_ADB_CUDA &&
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macintosh_config->adb_type != MAC_ADB_EGRET)
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return -ENODEV;
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#endif
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if (via == NULL)
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@ -1,677 +0,0 @@
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/*
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* Device driver for the IIsi-style ADB on some Mac LC and II-class machines
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*
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* Based on via-cuda.c and via-macii.c, as well as the original
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* adb-bus.c, which in turn is somewhat influenced by (but uses no
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* code from) the NetBSD HWDIRECT ADB code. Original IIsi driver work
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* was done by Robert Thompson and integrated into the old style
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* driver by Michael Schmitz.
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*
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* Original sources (c) Alan Cox, Paul Mackerras, and others.
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*
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* Rewritten for Unified ADB by David Huggins-Daines <dhd@debian.org>
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*
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* 7/13/2000- extensive changes by Andrew McPherson <andrew@macduff.dhs.org>
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* Works about 30% of the time now.
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/adb.h>
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#include <linux/cuda.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <asm/macintosh.h>
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#include <asm/macints.h>
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#include <asm/mac_via.h>
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static volatile unsigned char *via;
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/* VIA registers - spaced 0x200 bytes apart - only the ones we actually use */
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#define RS 0x200 /* skip between registers */
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#define B 0 /* B-side data */
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#define A RS /* A-side data */
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#define DIRB (2*RS) /* B-side direction (1=output) */
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#define DIRA (3*RS) /* A-side direction (1=output) */
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#define SR (10*RS) /* Shift register */
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#define ACR (11*RS) /* Auxiliary control register */
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#define IFR (13*RS) /* Interrupt flag register */
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#define IER (14*RS) /* Interrupt enable register */
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/* Bits in B data register: all active low */
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#define TREQ 0x08 /* Transfer request (input) */
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#define TACK 0x10 /* Transfer acknowledge (output) */
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#define TIP 0x20 /* Transfer in progress (output) */
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#define ST_MASK 0x30 /* mask for selecting ADB state bits */
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/* Bits in ACR */
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#define SR_CTRL 0x1c /* Shift register control bits */
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#define SR_EXT 0x0c /* Shift on external clock */
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#define SR_OUT 0x10 /* Shift out if 1 */
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/* Bits in IFR and IER */
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#define IER_SET 0x80 /* set bits in IER */
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#define IER_CLR 0 /* clear bits in IER */
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#define SR_INT 0x04 /* Shift register full/empty */
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#define SR_DATA 0x08 /* Shift register data */
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#define SR_CLOCK 0x10 /* Shift register clock */
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#define ADB_DELAY 150
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#undef DEBUG_MACIISI_ADB
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static struct adb_request* current_req;
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static struct adb_request* last_req;
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static unsigned char maciisi_rbuf[16];
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static unsigned char *reply_ptr;
|
||||
static int data_index;
|
||||
static int reading_reply;
|
||||
static int reply_len;
|
||||
static int tmp;
|
||||
static int need_sync;
|
||||
|
||||
static enum maciisi_state {
|
||||
idle,
|
||||
sending,
|
||||
reading,
|
||||
} maciisi_state;
|
||||
|
||||
static int maciisi_probe(void);
|
||||
static int maciisi_init(void);
|
||||
static int maciisi_send_request(struct adb_request* req, int sync);
|
||||
static void maciisi_sync(struct adb_request *req);
|
||||
static int maciisi_write(struct adb_request* req);
|
||||
static irqreturn_t maciisi_interrupt(int irq, void* arg);
|
||||
static void maciisi_input(unsigned char *buf, int nb);
|
||||
static int maciisi_init_via(void);
|
||||
static void maciisi_poll(void);
|
||||
static int maciisi_start(void);
|
||||
|
||||
struct adb_driver via_maciisi_driver = {
|
||||
"Mac IIsi",
|
||||
maciisi_probe,
|
||||
maciisi_init,
|
||||
maciisi_send_request,
|
||||
NULL, /* maciisi_adb_autopoll, */
|
||||
maciisi_poll,
|
||||
NULL /* maciisi_reset_adb_bus */
|
||||
};
|
||||
|
||||
static int
|
||||
maciisi_probe(void)
|
||||
{
|
||||
if (macintosh_config->adb_type != MAC_ADB_IISI)
|
||||
return -ENODEV;
|
||||
|
||||
via = via1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
maciisi_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
if (via == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
if ((err = maciisi_init_via())) {
|
||||
printk(KERN_ERR "maciisi_init: maciisi_init_via() failed, code %d\n", err);
|
||||
via = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
if (request_irq(IRQ_MAC_ADB, maciisi_interrupt, 0, "ADB",
|
||||
maciisi_interrupt)) {
|
||||
printk(KERN_ERR "maciisi_init: can't get irq %d\n", IRQ_MAC_ADB);
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
printk("adb: Mac IIsi driver v0.2 for Unified ADB.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Flush data from the ADB controller */
|
||||
static void
|
||||
maciisi_stfu(void)
|
||||
{
|
||||
int status = via[B] & (TIP|TREQ);
|
||||
|
||||
if (status & TREQ) {
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk (KERN_DEBUG "maciisi_stfu called with TREQ high!\n");
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
udelay(ADB_DELAY);
|
||||
via[ACR] &= ~SR_OUT;
|
||||
via[IER] = IER_CLR | SR_INT;
|
||||
|
||||
udelay(ADB_DELAY);
|
||||
|
||||
status = via[B] & (TIP|TREQ);
|
||||
|
||||
if (!(status & TREQ))
|
||||
{
|
||||
via[B] |= TIP;
|
||||
|
||||
while(1)
|
||||
{
|
||||
int poll_timeout = ADB_DELAY * 5;
|
||||
/* Poll for SR interrupt */
|
||||
while (!(via[IFR] & SR_INT) && poll_timeout-- > 0)
|
||||
status = via[B] & (TIP|TREQ);
|
||||
|
||||
tmp = via[SR]; /* Clear shift register */
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_stfu: status %x timeout %d data %x\n",
|
||||
status, poll_timeout, tmp);
|
||||
#endif
|
||||
if(via[B] & TREQ)
|
||||
break;
|
||||
|
||||
/* ACK on-off */
|
||||
via[B] |= TACK;
|
||||
udelay(ADB_DELAY);
|
||||
via[B] &= ~TACK;
|
||||
}
|
||||
|
||||
/* end frame */
|
||||
via[B] &= ~TIP;
|
||||
udelay(ADB_DELAY);
|
||||
}
|
||||
|
||||
via[IER] = IER_SET | SR_INT;
|
||||
}
|
||||
|
||||
/* All specifically VIA-related initialization goes here */
|
||||
static int
|
||||
maciisi_init_via(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Set the lines up. We want TREQ as input TACK|TIP as output */
|
||||
via[DIRB] = (via[DIRB] | TACK | TIP) & ~TREQ;
|
||||
/* Shift register on input */
|
||||
via[ACR] = (via[ACR] & ~SR_CTRL) | SR_EXT;
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_init_via: initial status %x\n", via[B] & (TIP|TREQ));
|
||||
#endif
|
||||
/* Wipe any pending data and int */
|
||||
tmp = via[SR];
|
||||
/* Enable keyboard interrupts */
|
||||
via[IER] = IER_SET | SR_INT;
|
||||
/* Set initial state: idle */
|
||||
via[B] &= ~(TACK|TIP);
|
||||
/* Clear interrupt bit */
|
||||
via[IFR] = SR_INT;
|
||||
|
||||
for(i = 0; i < 60; i++) {
|
||||
udelay(ADB_DELAY);
|
||||
maciisi_stfu();
|
||||
udelay(ADB_DELAY);
|
||||
if(via[B] & TREQ)
|
||||
break;
|
||||
}
|
||||
if (i == 60)
|
||||
printk(KERN_ERR "maciisi_init_via: bus jam?\n");
|
||||
|
||||
maciisi_state = idle;
|
||||
need_sync = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Send a request, possibly waiting for a reply */
|
||||
static int
|
||||
maciisi_send_request(struct adb_request* req, int sync)
|
||||
{
|
||||
int i;
|
||||
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
static int dump_packet = 0;
|
||||
#endif
|
||||
|
||||
if (via == NULL) {
|
||||
req->complete = 1;
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
if (dump_packet) {
|
||||
printk(KERN_DEBUG "maciisi_send_request:");
|
||||
for (i = 0; i < req->nbytes; i++) {
|
||||
printk(" %.2x", req->data[i]);
|
||||
}
|
||||
printk(" sync %d\n", sync);
|
||||
}
|
||||
#endif
|
||||
|
||||
req->reply_expected = 1;
|
||||
|
||||
i = maciisi_write(req);
|
||||
if (i)
|
||||
{
|
||||
/* Normally, if a packet requires syncing, that happens at the end of
|
||||
* maciisi_send_request. But if the transfer fails, it will be restarted
|
||||
* by maciisi_interrupt(). We use need_sync to tell maciisi_interrupt
|
||||
* when to sync a packet that it sends out.
|
||||
*
|
||||
* Suggestions on a better way to do this are welcome.
|
||||
*/
|
||||
if(i == -EBUSY && sync)
|
||||
need_sync = 1;
|
||||
else
|
||||
need_sync = 0;
|
||||
return i;
|
||||
}
|
||||
if(sync)
|
||||
maciisi_sync(req);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Poll the ADB chip until the request completes */
|
||||
static void maciisi_sync(struct adb_request *req)
|
||||
{
|
||||
int count = 0;
|
||||
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_sync called\n");
|
||||
#endif
|
||||
|
||||
/* If for some reason the ADB chip shuts up on us, we want to avoid an endless loop. */
|
||||
while (!req->complete && count++ < 50) {
|
||||
maciisi_poll();
|
||||
}
|
||||
/* This could be BAD... when the ADB controller doesn't respond
|
||||
* for this long, it's probably not coming back :-( */
|
||||
if (count > 50) /* Hopefully shouldn't happen */
|
||||
printk(KERN_ERR "maciisi_send_request: poll timed out!\n");
|
||||
}
|
||||
|
||||
int
|
||||
maciisi_request(struct adb_request *req, void (*done)(struct adb_request *),
|
||||
int nbytes, ...)
|
||||
{
|
||||
va_list list;
|
||||
int i;
|
||||
|
||||
req->nbytes = nbytes;
|
||||
req->done = done;
|
||||
req->reply_expected = 0;
|
||||
va_start(list, nbytes);
|
||||
for (i = 0; i < nbytes; i++)
|
||||
req->data[i++] = va_arg(list, int);
|
||||
va_end(list);
|
||||
|
||||
return maciisi_send_request(req, 1);
|
||||
}
|
||||
|
||||
/* Enqueue a request, and run the queue if possible */
|
||||
static int
|
||||
maciisi_write(struct adb_request* req)
|
||||
{
|
||||
unsigned long flags;
|
||||
int i;
|
||||
|
||||
/* We will accept CUDA packets - the VIA sends them to us, so
|
||||
it figures that we should be able to send them to it */
|
||||
if (req->nbytes < 2 || req->data[0] > CUDA_PACKET) {
|
||||
printk(KERN_ERR "maciisi_write: packet too small or not an ADB or CUDA packet\n");
|
||||
req->complete = 1;
|
||||
return -EINVAL;
|
||||
}
|
||||
req->next = NULL;
|
||||
req->sent = 0;
|
||||
req->complete = 0;
|
||||
req->reply_len = 0;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
if (current_req) {
|
||||
last_req->next = req;
|
||||
last_req = req;
|
||||
} else {
|
||||
current_req = req;
|
||||
last_req = req;
|
||||
}
|
||||
if (maciisi_state == idle)
|
||||
{
|
||||
i = maciisi_start();
|
||||
if(i != 0)
|
||||
{
|
||||
local_irq_restore(flags);
|
||||
return i;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_write: would start, but state is %d\n", maciisi_state);
|
||||
#endif
|
||||
local_irq_restore(flags);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
maciisi_start(void)
|
||||
{
|
||||
struct adb_request* req;
|
||||
int status;
|
||||
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
status = via[B] & (TIP | TREQ);
|
||||
|
||||
printk(KERN_DEBUG "maciisi_start called, state=%d, status=%x, ifr=%x\n", maciisi_state, status, via[IFR]);
|
||||
#endif
|
||||
|
||||
if (maciisi_state != idle) {
|
||||
/* shouldn't happen */
|
||||
printk(KERN_ERR "maciisi_start: maciisi_start called when driver busy!\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
req = current_req;
|
||||
if (req == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
status = via[B] & (TIP|TREQ);
|
||||
if (!(status & TREQ)) {
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_start: bus busy - aborting\n");
|
||||
#endif
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
/* Okay, send */
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "maciisi_start: sending\n");
|
||||
#endif
|
||||
/* Set state to active */
|
||||
via[B] |= TIP;
|
||||
/* ACK off */
|
||||
via[B] &= ~TACK;
|
||||
/* Delay */
|
||||
udelay(ADB_DELAY);
|
||||
/* Shift out and send */
|
||||
via[ACR] |= SR_OUT;
|
||||
via[SR] = req->data[0];
|
||||
data_index = 1;
|
||||
/* ACK on */
|
||||
via[B] |= TACK;
|
||||
maciisi_state = sending;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
maciisi_poll(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
if (via[IFR] & SR_INT) {
|
||||
maciisi_interrupt(0, NULL);
|
||||
}
|
||||
else /* avoid calling this function too quickly in a loop */
|
||||
udelay(ADB_DELAY);
|
||||
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
/* Shift register interrupt - this is *supposed* to mean that the
|
||||
register is either full or empty. In practice, I have no idea what
|
||||
it means :( */
|
||||
static irqreturn_t
|
||||
maciisi_interrupt(int irq, void* arg)
|
||||
{
|
||||
int status;
|
||||
struct adb_request *req;
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
static int dump_reply = 0;
|
||||
#endif
|
||||
int i;
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
status = via[B] & (TIP|TREQ);
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "state %d status %x ifr %x\n", maciisi_state, status, via[IFR]);
|
||||
#endif
|
||||
|
||||
if (!(via[IFR] & SR_INT)) {
|
||||
/* Shouldn't happen, we hope */
|
||||
printk(KERN_ERR "maciisi_interrupt: called without interrupt flag set\n");
|
||||
local_irq_restore(flags);
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
/* Clear the interrupt */
|
||||
/* via[IFR] = SR_INT; */
|
||||
|
||||
switch_start:
|
||||
switch (maciisi_state) {
|
||||
case idle:
|
||||
if (status & TIP)
|
||||
printk(KERN_ERR "maciisi_interrupt: state is idle but TIP asserted!\n");
|
||||
|
||||
if(!reading_reply)
|
||||
udelay(ADB_DELAY);
|
||||
/* Shift in */
|
||||
via[ACR] &= ~SR_OUT;
|
||||
/* Signal start of frame */
|
||||
via[B] |= TIP;
|
||||
/* Clear the interrupt (throw this value on the floor, it's useless) */
|
||||
tmp = via[SR];
|
||||
/* ACK adb chip, high-low */
|
||||
via[B] |= TACK;
|
||||
udelay(ADB_DELAY);
|
||||
via[B] &= ~TACK;
|
||||
reply_len = 0;
|
||||
maciisi_state = reading;
|
||||
if (reading_reply) {
|
||||
reply_ptr = current_req->reply;
|
||||
} else {
|
||||
reply_ptr = maciisi_rbuf;
|
||||
}
|
||||
break;
|
||||
|
||||
case sending:
|
||||
/* via[SR]; */
|
||||
/* Set ACK off */
|
||||
via[B] &= ~TACK;
|
||||
req = current_req;
|
||||
|
||||
if (!(status & TREQ)) {
|
||||
/* collision */
|
||||
printk(KERN_ERR "maciisi_interrupt: send collision\n");
|
||||
/* Set idle and input */
|
||||
via[ACR] &= ~SR_OUT;
|
||||
tmp = via[SR];
|
||||
via[B] &= ~TIP;
|
||||
/* Must re-send */
|
||||
reading_reply = 0;
|
||||
reply_len = 0;
|
||||
maciisi_state = idle;
|
||||
udelay(ADB_DELAY);
|
||||
/* process this now, because the IFR has been cleared */
|
||||
goto switch_start;
|
||||
}
|
||||
|
||||
udelay(ADB_DELAY);
|
||||
|
||||
if (data_index >= req->nbytes) {
|
||||
/* Sent the whole packet, put the bus back in idle state */
|
||||
/* Shift in, we are about to read a reply (hopefully) */
|
||||
via[ACR] &= ~SR_OUT;
|
||||
tmp = via[SR];
|
||||
/* End of frame */
|
||||
via[B] &= ~TIP;
|
||||
req->sent = 1;
|
||||
maciisi_state = idle;
|
||||
if (req->reply_expected) {
|
||||
/* Note: only set this once we've
|
||||
successfully sent the packet */
|
||||
reading_reply = 1;
|
||||
} else {
|
||||
current_req = req->next;
|
||||
if (req->done)
|
||||
(*req->done)(req);
|
||||
/* Do any queued requests now */
|
||||
i = maciisi_start();
|
||||
if(i == 0 && need_sync) {
|
||||
/* Packet needs to be synced */
|
||||
maciisi_sync(current_req);
|
||||
}
|
||||
if(i != -EBUSY)
|
||||
need_sync = 0;
|
||||
}
|
||||
} else {
|
||||
/* Sending more stuff */
|
||||
/* Shift out */
|
||||
via[ACR] |= SR_OUT;
|
||||
/* Write */
|
||||
via[SR] = req->data[data_index++];
|
||||
/* Signal 'byte ready' */
|
||||
via[B] |= TACK;
|
||||
}
|
||||
break;
|
||||
|
||||
case reading:
|
||||
/* Shift in */
|
||||
/* via[ACR] &= ~SR_OUT; */ /* Not in 2.2 */
|
||||
if (reply_len++ > 16) {
|
||||
printk(KERN_ERR "maciisi_interrupt: reply too long, aborting read\n");
|
||||
via[B] |= TACK;
|
||||
udelay(ADB_DELAY);
|
||||
via[B] &= ~(TACK|TIP);
|
||||
maciisi_state = idle;
|
||||
i = maciisi_start();
|
||||
if(i == 0 && need_sync) {
|
||||
/* Packet needs to be synced */
|
||||
maciisi_sync(current_req);
|
||||
}
|
||||
if(i != -EBUSY)
|
||||
need_sync = 0;
|
||||
break;
|
||||
}
|
||||
/* Read data */
|
||||
*reply_ptr++ = via[SR];
|
||||
status = via[B] & (TIP|TREQ);
|
||||
/* ACK on/off */
|
||||
via[B] |= TACK;
|
||||
udelay(ADB_DELAY);
|
||||
via[B] &= ~TACK;
|
||||
if (!(status & TREQ))
|
||||
break; /* more stuff to deal with */
|
||||
|
||||
/* end of frame */
|
||||
via[B] &= ~TIP;
|
||||
tmp = via[SR]; /* That's what happens in 2.2 */
|
||||
udelay(ADB_DELAY); /* Give controller time to recover */
|
||||
|
||||
/* end of packet, deal with it */
|
||||
if (reading_reply) {
|
||||
req = current_req;
|
||||
req->reply_len = reply_ptr - req->reply;
|
||||
if (req->data[0] == ADB_PACKET) {
|
||||
/* Have to adjust the reply from ADB commands */
|
||||
if (req->reply_len <= 2 || (req->reply[1] & 2) != 0) {
|
||||
/* the 0x2 bit indicates no response */
|
||||
req->reply_len = 0;
|
||||
} else {
|
||||
/* leave just the command and result bytes in the reply */
|
||||
req->reply_len -= 2;
|
||||
memmove(req->reply, req->reply + 2, req->reply_len);
|
||||
}
|
||||
}
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
if (dump_reply) {
|
||||
int i;
|
||||
printk(KERN_DEBUG "maciisi_interrupt: reply is ");
|
||||
for (i = 0; i < req->reply_len; ++i)
|
||||
printk(" %.2x", req->reply[i]);
|
||||
printk("\n");
|
||||
}
|
||||
#endif
|
||||
req->complete = 1;
|
||||
current_req = req->next;
|
||||
if (req->done)
|
||||
(*req->done)(req);
|
||||
/* Obviously, we got it */
|
||||
reading_reply = 0;
|
||||
} else {
|
||||
maciisi_input(maciisi_rbuf, reply_ptr - maciisi_rbuf);
|
||||
}
|
||||
maciisi_state = idle;
|
||||
status = via[B] & (TIP|TREQ);
|
||||
if (!(status & TREQ)) {
|
||||
/* Timeout?! More likely, another packet coming in already */
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "extra data after packet: status %x ifr %x\n",
|
||||
status, via[IFR]);
|
||||
#endif
|
||||
#if 0
|
||||
udelay(ADB_DELAY);
|
||||
via[B] |= TIP;
|
||||
|
||||
maciisi_state = reading;
|
||||
reading_reply = 0;
|
||||
reply_ptr = maciisi_rbuf;
|
||||
#else
|
||||
/* Process the packet now */
|
||||
reading_reply = 0;
|
||||
goto switch_start;
|
||||
#endif
|
||||
/* We used to do this... but the controller might actually have data for us */
|
||||
/* maciisi_stfu(); */
|
||||
}
|
||||
else {
|
||||
/* Do any queued requests now if possible */
|
||||
i = maciisi_start();
|
||||
if(i == 0 && need_sync) {
|
||||
/* Packet needs to be synced */
|
||||
maciisi_sync(current_req);
|
||||
}
|
||||
if(i != -EBUSY)
|
||||
need_sync = 0;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
printk("maciisi_interrupt: unknown maciisi_state %d?\n", maciisi_state);
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void
|
||||
maciisi_input(unsigned char *buf, int nb)
|
||||
{
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
int i;
|
||||
#endif
|
||||
|
||||
switch (buf[0]) {
|
||||
case ADB_PACKET:
|
||||
adb_input(buf+2, nb-2, buf[1] & 0x40);
|
||||
break;
|
||||
default:
|
||||
#ifdef DEBUG_MACIISI_ADB
|
||||
printk(KERN_DEBUG "data from IIsi ADB (%d bytes):", nb);
|
||||
for (i = 0; i < nb; ++i)
|
||||
printk(" %.2x", buf[i]);
|
||||
printk("\n");
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue