715 lines
25 KiB
C
715 lines
25 KiB
C
/*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2009-2012, The Linux Foundation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/bitops.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <mach/msm_gpiomux.h>
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/* see 80-VA736-2 Rev C pp 695-751
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**
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** These are actually the *shadow* gpio registers, since the
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** real ones (which allow full access) are only available to the
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** ARM9 side of the world.
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**
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** Since the _BASE need to be page-aligned when we're mapping them
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** to virtual addresses, adjust for the additional offset in these
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** macros.
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*/
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#define MSM_GPIO1_REG(off) (off)
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#define MSM_GPIO2_REG(off) (off)
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#define MSM_GPIO1_SHADOW_REG(off) (off)
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#define MSM_GPIO2_SHADOW_REG(off) (off)
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/*
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* MSM7X00 registers
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*/
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/* output value */
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#define MSM7X00_GPIO_OUT_0 MSM_GPIO1_SHADOW_REG(0x00) /* gpio 15-0 */
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#define MSM7X00_GPIO_OUT_1 MSM_GPIO2_SHADOW_REG(0x00) /* gpio 42-16 */
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#define MSM7X00_GPIO_OUT_2 MSM_GPIO1_SHADOW_REG(0x04) /* gpio 67-43 */
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#define MSM7X00_GPIO_OUT_3 MSM_GPIO1_SHADOW_REG(0x08) /* gpio 94-68 */
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#define MSM7X00_GPIO_OUT_4 MSM_GPIO1_SHADOW_REG(0x0C) /* gpio 106-95 */
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#define MSM7X00_GPIO_OUT_5 MSM_GPIO1_SHADOW_REG(0x50) /* gpio 107-121 */
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/* same pin map as above, output enable */
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#define MSM7X00_GPIO_OE_0 MSM_GPIO1_SHADOW_REG(0x10)
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#define MSM7X00_GPIO_OE_1 MSM_GPIO2_SHADOW_REG(0x08)
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#define MSM7X00_GPIO_OE_2 MSM_GPIO1_SHADOW_REG(0x14)
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#define MSM7X00_GPIO_OE_3 MSM_GPIO1_SHADOW_REG(0x18)
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#define MSM7X00_GPIO_OE_4 MSM_GPIO1_SHADOW_REG(0x1C)
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#define MSM7X00_GPIO_OE_5 MSM_GPIO1_SHADOW_REG(0x54)
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/* same pin map as above, input read */
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#define MSM7X00_GPIO_IN_0 MSM_GPIO1_SHADOW_REG(0x34)
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#define MSM7X00_GPIO_IN_1 MSM_GPIO2_SHADOW_REG(0x20)
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#define MSM7X00_GPIO_IN_2 MSM_GPIO1_SHADOW_REG(0x38)
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#define MSM7X00_GPIO_IN_3 MSM_GPIO1_SHADOW_REG(0x3C)
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#define MSM7X00_GPIO_IN_4 MSM_GPIO1_SHADOW_REG(0x40)
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#define MSM7X00_GPIO_IN_5 MSM_GPIO1_SHADOW_REG(0x44)
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/* same pin map as above, 1=edge 0=level interrup */
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#define MSM7X00_GPIO_INT_EDGE_0 MSM_GPIO1_SHADOW_REG(0x60)
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#define MSM7X00_GPIO_INT_EDGE_1 MSM_GPIO2_SHADOW_REG(0x50)
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#define MSM7X00_GPIO_INT_EDGE_2 MSM_GPIO1_SHADOW_REG(0x64)
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#define MSM7X00_GPIO_INT_EDGE_3 MSM_GPIO1_SHADOW_REG(0x68)
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#define MSM7X00_GPIO_INT_EDGE_4 MSM_GPIO1_SHADOW_REG(0x6C)
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#define MSM7X00_GPIO_INT_EDGE_5 MSM_GPIO1_SHADOW_REG(0xC0)
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/* same pin map as above, 1=positive 0=negative */
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#define MSM7X00_GPIO_INT_POS_0 MSM_GPIO1_SHADOW_REG(0x70)
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#define MSM7X00_GPIO_INT_POS_1 MSM_GPIO2_SHADOW_REG(0x58)
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#define MSM7X00_GPIO_INT_POS_2 MSM_GPIO1_SHADOW_REG(0x74)
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#define MSM7X00_GPIO_INT_POS_3 MSM_GPIO1_SHADOW_REG(0x78)
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#define MSM7X00_GPIO_INT_POS_4 MSM_GPIO1_SHADOW_REG(0x7C)
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#define MSM7X00_GPIO_INT_POS_5 MSM_GPIO1_SHADOW_REG(0xBC)
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/* same pin map as above, interrupt enable */
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#define MSM7X00_GPIO_INT_EN_0 MSM_GPIO1_SHADOW_REG(0x80)
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#define MSM7X00_GPIO_INT_EN_1 MSM_GPIO2_SHADOW_REG(0x60)
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#define MSM7X00_GPIO_INT_EN_2 MSM_GPIO1_SHADOW_REG(0x84)
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#define MSM7X00_GPIO_INT_EN_3 MSM_GPIO1_SHADOW_REG(0x88)
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#define MSM7X00_GPIO_INT_EN_4 MSM_GPIO1_SHADOW_REG(0x8C)
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#define MSM7X00_GPIO_INT_EN_5 MSM_GPIO1_SHADOW_REG(0xB8)
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/* same pin map as above, write 1 to clear interrupt */
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#define MSM7X00_GPIO_INT_CLEAR_0 MSM_GPIO1_SHADOW_REG(0x90)
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#define MSM7X00_GPIO_INT_CLEAR_1 MSM_GPIO2_SHADOW_REG(0x68)
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#define MSM7X00_GPIO_INT_CLEAR_2 MSM_GPIO1_SHADOW_REG(0x94)
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#define MSM7X00_GPIO_INT_CLEAR_3 MSM_GPIO1_SHADOW_REG(0x98)
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#define MSM7X00_GPIO_INT_CLEAR_4 MSM_GPIO1_SHADOW_REG(0x9C)
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#define MSM7X00_GPIO_INT_CLEAR_5 MSM_GPIO1_SHADOW_REG(0xB4)
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/* same pin map as above, 1=interrupt pending */
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#define MSM7X00_GPIO_INT_STATUS_0 MSM_GPIO1_SHADOW_REG(0xA0)
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#define MSM7X00_GPIO_INT_STATUS_1 MSM_GPIO2_SHADOW_REG(0x70)
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#define MSM7X00_GPIO_INT_STATUS_2 MSM_GPIO1_SHADOW_REG(0xA4)
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#define MSM7X00_GPIO_INT_STATUS_3 MSM_GPIO1_SHADOW_REG(0xA8)
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#define MSM7X00_GPIO_INT_STATUS_4 MSM_GPIO1_SHADOW_REG(0xAC)
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#define MSM7X00_GPIO_INT_STATUS_5 MSM_GPIO1_SHADOW_REG(0xB0)
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/*
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* QSD8X50 registers
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*/
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/* output value */
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#define QSD8X50_GPIO_OUT_0 MSM_GPIO1_SHADOW_REG(0x00) /* gpio 15-0 */
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#define QSD8X50_GPIO_OUT_1 MSM_GPIO2_SHADOW_REG(0x00) /* gpio 42-16 */
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#define QSD8X50_GPIO_OUT_2 MSM_GPIO1_SHADOW_REG(0x04) /* gpio 67-43 */
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#define QSD8X50_GPIO_OUT_3 MSM_GPIO1_SHADOW_REG(0x08) /* gpio 94-68 */
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#define QSD8X50_GPIO_OUT_4 MSM_GPIO1_SHADOW_REG(0x0C) /* gpio 103-95 */
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#define QSD8X50_GPIO_OUT_5 MSM_GPIO1_SHADOW_REG(0x10) /* gpio 121-104 */
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#define QSD8X50_GPIO_OUT_6 MSM_GPIO1_SHADOW_REG(0x14) /* gpio 152-122 */
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#define QSD8X50_GPIO_OUT_7 MSM_GPIO1_SHADOW_REG(0x18) /* gpio 164-153 */
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/* same pin map as above, output enable */
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#define QSD8X50_GPIO_OE_0 MSM_GPIO1_SHADOW_REG(0x20)
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#define QSD8X50_GPIO_OE_1 MSM_GPIO2_SHADOW_REG(0x08)
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#define QSD8X50_GPIO_OE_2 MSM_GPIO1_SHADOW_REG(0x24)
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#define QSD8X50_GPIO_OE_3 MSM_GPIO1_SHADOW_REG(0x28)
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#define QSD8X50_GPIO_OE_4 MSM_GPIO1_SHADOW_REG(0x2C)
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#define QSD8X50_GPIO_OE_5 MSM_GPIO1_SHADOW_REG(0x30)
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#define QSD8X50_GPIO_OE_6 MSM_GPIO1_SHADOW_REG(0x34)
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#define QSD8X50_GPIO_OE_7 MSM_GPIO1_SHADOW_REG(0x38)
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/* same pin map as above, input read */
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#define QSD8X50_GPIO_IN_0 MSM_GPIO1_SHADOW_REG(0x50)
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#define QSD8X50_GPIO_IN_1 MSM_GPIO2_SHADOW_REG(0x20)
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#define QSD8X50_GPIO_IN_2 MSM_GPIO1_SHADOW_REG(0x54)
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#define QSD8X50_GPIO_IN_3 MSM_GPIO1_SHADOW_REG(0x58)
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#define QSD8X50_GPIO_IN_4 MSM_GPIO1_SHADOW_REG(0x5C)
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#define QSD8X50_GPIO_IN_5 MSM_GPIO1_SHADOW_REG(0x60)
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#define QSD8X50_GPIO_IN_6 MSM_GPIO1_SHADOW_REG(0x64)
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#define QSD8X50_GPIO_IN_7 MSM_GPIO1_SHADOW_REG(0x68)
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/* same pin map as above, 1=edge 0=level interrup */
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#define QSD8X50_GPIO_INT_EDGE_0 MSM_GPIO1_SHADOW_REG(0x70)
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#define QSD8X50_GPIO_INT_EDGE_1 MSM_GPIO2_SHADOW_REG(0x50)
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#define QSD8X50_GPIO_INT_EDGE_2 MSM_GPIO1_SHADOW_REG(0x74)
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#define QSD8X50_GPIO_INT_EDGE_3 MSM_GPIO1_SHADOW_REG(0x78)
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#define QSD8X50_GPIO_INT_EDGE_4 MSM_GPIO1_SHADOW_REG(0x7C)
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#define QSD8X50_GPIO_INT_EDGE_5 MSM_GPIO1_SHADOW_REG(0x80)
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#define QSD8X50_GPIO_INT_EDGE_6 MSM_GPIO1_SHADOW_REG(0x84)
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#define QSD8X50_GPIO_INT_EDGE_7 MSM_GPIO1_SHADOW_REG(0x88)
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/* same pin map as above, 1=positive 0=negative */
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#define QSD8X50_GPIO_INT_POS_0 MSM_GPIO1_SHADOW_REG(0x90)
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#define QSD8X50_GPIO_INT_POS_1 MSM_GPIO2_SHADOW_REG(0x58)
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#define QSD8X50_GPIO_INT_POS_2 MSM_GPIO1_SHADOW_REG(0x94)
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#define QSD8X50_GPIO_INT_POS_3 MSM_GPIO1_SHADOW_REG(0x98)
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#define QSD8X50_GPIO_INT_POS_4 MSM_GPIO1_SHADOW_REG(0x9C)
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#define QSD8X50_GPIO_INT_POS_5 MSM_GPIO1_SHADOW_REG(0xA0)
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#define QSD8X50_GPIO_INT_POS_6 MSM_GPIO1_SHADOW_REG(0xA4)
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#define QSD8X50_GPIO_INT_POS_7 MSM_GPIO1_SHADOW_REG(0xA8)
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/* same pin map as above, interrupt enable */
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#define QSD8X50_GPIO_INT_EN_0 MSM_GPIO1_SHADOW_REG(0xB0)
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#define QSD8X50_GPIO_INT_EN_1 MSM_GPIO2_SHADOW_REG(0x60)
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#define QSD8X50_GPIO_INT_EN_2 MSM_GPIO1_SHADOW_REG(0xB4)
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#define QSD8X50_GPIO_INT_EN_3 MSM_GPIO1_SHADOW_REG(0xB8)
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#define QSD8X50_GPIO_INT_EN_4 MSM_GPIO1_SHADOW_REG(0xBC)
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#define QSD8X50_GPIO_INT_EN_5 MSM_GPIO1_SHADOW_REG(0xC0)
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#define QSD8X50_GPIO_INT_EN_6 MSM_GPIO1_SHADOW_REG(0xC4)
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#define QSD8X50_GPIO_INT_EN_7 MSM_GPIO1_SHADOW_REG(0xC8)
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/* same pin map as above, write 1 to clear interrupt */
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#define QSD8X50_GPIO_INT_CLEAR_0 MSM_GPIO1_SHADOW_REG(0xD0)
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#define QSD8X50_GPIO_INT_CLEAR_1 MSM_GPIO2_SHADOW_REG(0x68)
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#define QSD8X50_GPIO_INT_CLEAR_2 MSM_GPIO1_SHADOW_REG(0xD4)
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#define QSD8X50_GPIO_INT_CLEAR_3 MSM_GPIO1_SHADOW_REG(0xD8)
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#define QSD8X50_GPIO_INT_CLEAR_4 MSM_GPIO1_SHADOW_REG(0xDC)
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#define QSD8X50_GPIO_INT_CLEAR_5 MSM_GPIO1_SHADOW_REG(0xE0)
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#define QSD8X50_GPIO_INT_CLEAR_6 MSM_GPIO1_SHADOW_REG(0xE4)
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#define QSD8X50_GPIO_INT_CLEAR_7 MSM_GPIO1_SHADOW_REG(0xE8)
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/* same pin map as above, 1=interrupt pending */
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#define QSD8X50_GPIO_INT_STATUS_0 MSM_GPIO1_SHADOW_REG(0xF0)
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#define QSD8X50_GPIO_INT_STATUS_1 MSM_GPIO2_SHADOW_REG(0x70)
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#define QSD8X50_GPIO_INT_STATUS_2 MSM_GPIO1_SHADOW_REG(0xF4)
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#define QSD8X50_GPIO_INT_STATUS_3 MSM_GPIO1_SHADOW_REG(0xF8)
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#define QSD8X50_GPIO_INT_STATUS_4 MSM_GPIO1_SHADOW_REG(0xFC)
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#define QSD8X50_GPIO_INT_STATUS_5 MSM_GPIO1_SHADOW_REG(0x100)
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#define QSD8X50_GPIO_INT_STATUS_6 MSM_GPIO1_SHADOW_REG(0x104)
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#define QSD8X50_GPIO_INT_STATUS_7 MSM_GPIO1_SHADOW_REG(0x108)
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/*
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* MSM7X30 registers
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*/
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/* output value */
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#define MSM7X30_GPIO_OUT_0 MSM_GPIO1_REG(0x00) /* gpio 15-0 */
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#define MSM7X30_GPIO_OUT_1 MSM_GPIO2_REG(0x00) /* gpio 43-16 */
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#define MSM7X30_GPIO_OUT_2 MSM_GPIO1_REG(0x04) /* gpio 67-44 */
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#define MSM7X30_GPIO_OUT_3 MSM_GPIO1_REG(0x08) /* gpio 94-68 */
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#define MSM7X30_GPIO_OUT_4 MSM_GPIO1_REG(0x0C) /* gpio 106-95 */
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#define MSM7X30_GPIO_OUT_5 MSM_GPIO1_REG(0x50) /* gpio 133-107 */
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#define MSM7X30_GPIO_OUT_6 MSM_GPIO1_REG(0xC4) /* gpio 150-134 */
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#define MSM7X30_GPIO_OUT_7 MSM_GPIO1_REG(0x214) /* gpio 181-151 */
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/* same pin map as above, output enable */
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#define MSM7X30_GPIO_OE_0 MSM_GPIO1_REG(0x10)
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#define MSM7X30_GPIO_OE_1 MSM_GPIO2_REG(0x08)
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#define MSM7X30_GPIO_OE_2 MSM_GPIO1_REG(0x14)
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#define MSM7X30_GPIO_OE_3 MSM_GPIO1_REG(0x18)
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#define MSM7X30_GPIO_OE_4 MSM_GPIO1_REG(0x1C)
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#define MSM7X30_GPIO_OE_5 MSM_GPIO1_REG(0x54)
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#define MSM7X30_GPIO_OE_6 MSM_GPIO1_REG(0xC8)
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#define MSM7X30_GPIO_OE_7 MSM_GPIO1_REG(0x218)
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/* same pin map as above, input read */
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#define MSM7X30_GPIO_IN_0 MSM_GPIO1_REG(0x34)
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#define MSM7X30_GPIO_IN_1 MSM_GPIO2_REG(0x20)
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#define MSM7X30_GPIO_IN_2 MSM_GPIO1_REG(0x38)
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#define MSM7X30_GPIO_IN_3 MSM_GPIO1_REG(0x3C)
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#define MSM7X30_GPIO_IN_4 MSM_GPIO1_REG(0x40)
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#define MSM7X30_GPIO_IN_5 MSM_GPIO1_REG(0x44)
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#define MSM7X30_GPIO_IN_6 MSM_GPIO1_REG(0xCC)
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#define MSM7X30_GPIO_IN_7 MSM_GPIO1_REG(0x21C)
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/* same pin map as above, 1=edge 0=level interrup */
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#define MSM7X30_GPIO_INT_EDGE_0 MSM_GPIO1_REG(0x60)
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#define MSM7X30_GPIO_INT_EDGE_1 MSM_GPIO2_REG(0x50)
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#define MSM7X30_GPIO_INT_EDGE_2 MSM_GPIO1_REG(0x64)
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#define MSM7X30_GPIO_INT_EDGE_3 MSM_GPIO1_REG(0x68)
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#define MSM7X30_GPIO_INT_EDGE_4 MSM_GPIO1_REG(0x6C)
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#define MSM7X30_GPIO_INT_EDGE_5 MSM_GPIO1_REG(0xC0)
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#define MSM7X30_GPIO_INT_EDGE_6 MSM_GPIO1_REG(0xD0)
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#define MSM7X30_GPIO_INT_EDGE_7 MSM_GPIO1_REG(0x240)
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/* same pin map as above, 1=positive 0=negative */
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#define MSM7X30_GPIO_INT_POS_0 MSM_GPIO1_REG(0x70)
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#define MSM7X30_GPIO_INT_POS_1 MSM_GPIO2_REG(0x58)
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#define MSM7X30_GPIO_INT_POS_2 MSM_GPIO1_REG(0x74)
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#define MSM7X30_GPIO_INT_POS_3 MSM_GPIO1_REG(0x78)
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#define MSM7X30_GPIO_INT_POS_4 MSM_GPIO1_REG(0x7C)
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#define MSM7X30_GPIO_INT_POS_5 MSM_GPIO1_REG(0xBC)
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#define MSM7X30_GPIO_INT_POS_6 MSM_GPIO1_REG(0xD4)
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#define MSM7X30_GPIO_INT_POS_7 MSM_GPIO1_REG(0x228)
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/* same pin map as above, interrupt enable */
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#define MSM7X30_GPIO_INT_EN_0 MSM_GPIO1_REG(0x80)
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#define MSM7X30_GPIO_INT_EN_1 MSM_GPIO2_REG(0x60)
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#define MSM7X30_GPIO_INT_EN_2 MSM_GPIO1_REG(0x84)
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#define MSM7X30_GPIO_INT_EN_3 MSM_GPIO1_REG(0x88)
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#define MSM7X30_GPIO_INT_EN_4 MSM_GPIO1_REG(0x8C)
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#define MSM7X30_GPIO_INT_EN_5 MSM_GPIO1_REG(0xB8)
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#define MSM7X30_GPIO_INT_EN_6 MSM_GPIO1_REG(0xD8)
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#define MSM7X30_GPIO_INT_EN_7 MSM_GPIO1_REG(0x22C)
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/* same pin map as above, write 1 to clear interrupt */
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#define MSM7X30_GPIO_INT_CLEAR_0 MSM_GPIO1_REG(0x90)
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#define MSM7X30_GPIO_INT_CLEAR_1 MSM_GPIO2_REG(0x68)
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#define MSM7X30_GPIO_INT_CLEAR_2 MSM_GPIO1_REG(0x94)
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#define MSM7X30_GPIO_INT_CLEAR_3 MSM_GPIO1_REG(0x98)
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#define MSM7X30_GPIO_INT_CLEAR_4 MSM_GPIO1_REG(0x9C)
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#define MSM7X30_GPIO_INT_CLEAR_5 MSM_GPIO1_REG(0xB4)
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#define MSM7X30_GPIO_INT_CLEAR_6 MSM_GPIO1_REG(0xDC)
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#define MSM7X30_GPIO_INT_CLEAR_7 MSM_GPIO1_REG(0x230)
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/* same pin map as above, 1=interrupt pending */
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#define MSM7X30_GPIO_INT_STATUS_0 MSM_GPIO1_REG(0xA0)
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#define MSM7X30_GPIO_INT_STATUS_1 MSM_GPIO2_REG(0x70)
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#define MSM7X30_GPIO_INT_STATUS_2 MSM_GPIO1_REG(0xA4)
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#define MSM7X30_GPIO_INT_STATUS_3 MSM_GPIO1_REG(0xA8)
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#define MSM7X30_GPIO_INT_STATUS_4 MSM_GPIO1_REG(0xAC)
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#define MSM7X30_GPIO_INT_STATUS_5 MSM_GPIO1_REG(0xB0)
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#define MSM7X30_GPIO_INT_STATUS_6 MSM_GPIO1_REG(0xE0)
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#define MSM7X30_GPIO_INT_STATUS_7 MSM_GPIO1_REG(0x234)
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#define FIRST_GPIO_IRQ MSM_GPIO_TO_INT(0)
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#define MSM_GPIO_BANK(soc, bank, first, last) \
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{ \
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.regs[MSM_GPIO_OUT] = soc##_GPIO_OUT_##bank, \
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.regs[MSM_GPIO_IN] = soc##_GPIO_IN_##bank, \
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.regs[MSM_GPIO_INT_STATUS] = soc##_GPIO_INT_STATUS_##bank, \
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.regs[MSM_GPIO_INT_CLEAR] = soc##_GPIO_INT_CLEAR_##bank, \
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.regs[MSM_GPIO_INT_EN] = soc##_GPIO_INT_EN_##bank, \
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.regs[MSM_GPIO_INT_EDGE] = soc##_GPIO_INT_EDGE_##bank, \
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.regs[MSM_GPIO_INT_POS] = soc##_GPIO_INT_POS_##bank, \
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.regs[MSM_GPIO_OE] = soc##_GPIO_OE_##bank, \
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.chip = { \
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.base = (first), \
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|
.ngpio = (last) - (first) + 1, \
|
|
.get = msm_gpio_get, \
|
|
.set = msm_gpio_set, \
|
|
.direction_input = msm_gpio_direction_input, \
|
|
.direction_output = msm_gpio_direction_output, \
|
|
.to_irq = msm_gpio_to_irq, \
|
|
.request = msm_gpio_request, \
|
|
.free = msm_gpio_free, \
|
|
} \
|
|
}
|
|
|
|
#define MSM_GPIO_BROKEN_INT_CLEAR 1
|
|
|
|
enum msm_gpio_reg {
|
|
MSM_GPIO_IN,
|
|
MSM_GPIO_OUT,
|
|
MSM_GPIO_INT_STATUS,
|
|
MSM_GPIO_INT_CLEAR,
|
|
MSM_GPIO_INT_EN,
|
|
MSM_GPIO_INT_EDGE,
|
|
MSM_GPIO_INT_POS,
|
|
MSM_GPIO_OE,
|
|
MSM_GPIO_REG_NR
|
|
};
|
|
|
|
struct msm_gpio_chip {
|
|
spinlock_t lock;
|
|
struct gpio_chip chip;
|
|
unsigned long regs[MSM_GPIO_REG_NR];
|
|
#if MSM_GPIO_BROKEN_INT_CLEAR
|
|
unsigned int_status_copy;
|
|
#endif
|
|
unsigned int both_edge_detect;
|
|
unsigned int int_enable[2]; /* 0: awake, 1: sleep */
|
|
void __iomem *base;
|
|
};
|
|
|
|
struct msm_gpio_initdata {
|
|
struct msm_gpio_chip *chips;
|
|
int count;
|
|
};
|
|
|
|
static void msm_gpio_writel(struct msm_gpio_chip *chip, u32 val,
|
|
enum msm_gpio_reg reg)
|
|
{
|
|
writel(val, chip->base + chip->regs[reg]);
|
|
}
|
|
|
|
static u32 msm_gpio_readl(struct msm_gpio_chip *chip, enum msm_gpio_reg reg)
|
|
{
|
|
return readl(chip->base + chip->regs[reg]);
|
|
}
|
|
|
|
static int msm_gpio_write(struct msm_gpio_chip *msm_chip,
|
|
unsigned offset, unsigned on)
|
|
{
|
|
unsigned mask = BIT(offset);
|
|
unsigned val;
|
|
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_OUT);
|
|
if (on)
|
|
msm_gpio_writel(msm_chip, val | mask, MSM_GPIO_OUT);
|
|
else
|
|
msm_gpio_writel(msm_chip, val & ~mask, MSM_GPIO_OUT);
|
|
return 0;
|
|
}
|
|
|
|
static void msm_gpio_update_both_edge_detect(struct msm_gpio_chip *msm_chip)
|
|
{
|
|
int loop_limit = 100;
|
|
unsigned pol, val, val2, intstat;
|
|
do {
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_IN);
|
|
pol = msm_gpio_readl(msm_chip, MSM_GPIO_INT_POS);
|
|
pol = (pol & ~msm_chip->both_edge_detect) |
|
|
(~val & msm_chip->both_edge_detect);
|
|
msm_gpio_writel(msm_chip, pol, MSM_GPIO_INT_POS);
|
|
intstat = msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
|
|
val2 = msm_gpio_readl(msm_chip, MSM_GPIO_IN);
|
|
if (((val ^ val2) & msm_chip->both_edge_detect & ~intstat) == 0)
|
|
return;
|
|
} while (loop_limit-- > 0);
|
|
printk(KERN_ERR "msm_gpio_update_both_edge_detect, "
|
|
"failed to reach stable state %x != %x\n", val, val2);
|
|
}
|
|
|
|
static int msm_gpio_clear_detect_status(struct msm_gpio_chip *msm_chip,
|
|
unsigned offset)
|
|
{
|
|
unsigned bit = BIT(offset);
|
|
|
|
#if MSM_GPIO_BROKEN_INT_CLEAR
|
|
/* Save interrupts that already triggered before we loose them. */
|
|
/* Any interrupt that triggers between the read of int_status */
|
|
/* and the write to int_clear will still be lost though. */
|
|
msm_chip->int_status_copy |=
|
|
msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
|
|
msm_chip->int_status_copy &= ~bit;
|
|
#endif
|
|
msm_gpio_writel(msm_chip, bit, MSM_GPIO_INT_CLEAR);
|
|
msm_gpio_update_both_edge_detect(msm_chip);
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct msm_gpio_chip *msm_chip;
|
|
unsigned long irq_flags;
|
|
u32 val;
|
|
|
|
msm_chip = container_of(chip, struct msm_gpio_chip, chip);
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_OE) & ~BIT(offset);
|
|
msm_gpio_writel(msm_chip, val, MSM_GPIO_OE);
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msm_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
struct msm_gpio_chip *msm_chip;
|
|
unsigned long irq_flags;
|
|
u32 val;
|
|
|
|
msm_chip = container_of(chip, struct msm_gpio_chip, chip);
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
msm_gpio_write(msm_chip, offset, value);
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_OE) | BIT(offset);
|
|
msm_gpio_writel(msm_chip, val, MSM_GPIO_OE);
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct msm_gpio_chip *msm_chip;
|
|
|
|
msm_chip = container_of(chip, struct msm_gpio_chip, chip);
|
|
return (msm_gpio_readl(msm_chip, MSM_GPIO_IN) & (1U << offset)) ? 1 : 0;
|
|
}
|
|
|
|
static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
struct msm_gpio_chip *msm_chip;
|
|
unsigned long irq_flags;
|
|
|
|
msm_chip = container_of(chip, struct msm_gpio_chip, chip);
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
msm_gpio_write(msm_chip, offset, value);
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
}
|
|
|
|
static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return MSM_GPIO_TO_INT(chip->base + offset);
|
|
}
|
|
|
|
#ifdef CONFIG_MSM_GPIOMUX
|
|
static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return msm_gpiomux_get(chip->base + offset);
|
|
}
|
|
|
|
static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
msm_gpiomux_put(chip->base + offset);
|
|
}
|
|
#else
|
|
#define msm_gpio_request NULL
|
|
#define msm_gpio_free NULL
|
|
#endif
|
|
|
|
static struct msm_gpio_chip *msm_gpio_chips;
|
|
static int msm_gpio_count;
|
|
|
|
static struct msm_gpio_chip msm_gpio_chips_msm7x01[] = {
|
|
MSM_GPIO_BANK(MSM7X00, 0, 0, 15),
|
|
MSM_GPIO_BANK(MSM7X00, 1, 16, 42),
|
|
MSM_GPIO_BANK(MSM7X00, 2, 43, 67),
|
|
MSM_GPIO_BANK(MSM7X00, 3, 68, 94),
|
|
MSM_GPIO_BANK(MSM7X00, 4, 95, 106),
|
|
MSM_GPIO_BANK(MSM7X00, 5, 107, 121),
|
|
};
|
|
|
|
static struct msm_gpio_initdata msm_gpio_7x01_init = {
|
|
.chips = msm_gpio_chips_msm7x01,
|
|
.count = ARRAY_SIZE(msm_gpio_chips_msm7x01),
|
|
};
|
|
|
|
static struct msm_gpio_chip msm_gpio_chips_msm7x30[] = {
|
|
MSM_GPIO_BANK(MSM7X30, 0, 0, 15),
|
|
MSM_GPIO_BANK(MSM7X30, 1, 16, 43),
|
|
MSM_GPIO_BANK(MSM7X30, 2, 44, 67),
|
|
MSM_GPIO_BANK(MSM7X30, 3, 68, 94),
|
|
MSM_GPIO_BANK(MSM7X30, 4, 95, 106),
|
|
MSM_GPIO_BANK(MSM7X30, 5, 107, 133),
|
|
MSM_GPIO_BANK(MSM7X30, 6, 134, 150),
|
|
MSM_GPIO_BANK(MSM7X30, 7, 151, 181),
|
|
};
|
|
|
|
static struct msm_gpio_initdata msm_gpio_7x30_init = {
|
|
.chips = msm_gpio_chips_msm7x30,
|
|
.count = ARRAY_SIZE(msm_gpio_chips_msm7x30),
|
|
};
|
|
|
|
static struct msm_gpio_chip msm_gpio_chips_qsd8x50[] = {
|
|
MSM_GPIO_BANK(QSD8X50, 0, 0, 15),
|
|
MSM_GPIO_BANK(QSD8X50, 1, 16, 42),
|
|
MSM_GPIO_BANK(QSD8X50, 2, 43, 67),
|
|
MSM_GPIO_BANK(QSD8X50, 3, 68, 94),
|
|
MSM_GPIO_BANK(QSD8X50, 4, 95, 103),
|
|
MSM_GPIO_BANK(QSD8X50, 5, 104, 121),
|
|
MSM_GPIO_BANK(QSD8X50, 6, 122, 152),
|
|
MSM_GPIO_BANK(QSD8X50, 7, 153, 164),
|
|
};
|
|
|
|
static struct msm_gpio_initdata msm_gpio_8x50_init = {
|
|
.chips = msm_gpio_chips_qsd8x50,
|
|
.count = ARRAY_SIZE(msm_gpio_chips_qsd8x50),
|
|
};
|
|
|
|
static void msm_gpio_irq_ack(struct irq_data *d)
|
|
{
|
|
unsigned long irq_flags;
|
|
struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
msm_gpio_clear_detect_status(msm_chip,
|
|
d->irq - gpio_to_irq(msm_chip->chip.base));
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
}
|
|
|
|
static void msm_gpio_irq_mask(struct irq_data *d)
|
|
{
|
|
unsigned long irq_flags;
|
|
struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
|
|
unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
|
|
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
/* level triggered interrupts are also latched */
|
|
if (!(msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE) & BIT(offset)))
|
|
msm_gpio_clear_detect_status(msm_chip, offset);
|
|
msm_chip->int_enable[0] &= ~BIT(offset);
|
|
msm_gpio_writel(msm_chip, msm_chip->int_enable[0], MSM_GPIO_INT_EN);
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
}
|
|
|
|
static void msm_gpio_irq_unmask(struct irq_data *d)
|
|
{
|
|
unsigned long irq_flags;
|
|
struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
|
|
unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
|
|
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
/* level triggered interrupts are also latched */
|
|
if (!(msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE) & BIT(offset)))
|
|
msm_gpio_clear_detect_status(msm_chip, offset);
|
|
msm_chip->int_enable[0] |= BIT(offset);
|
|
msm_gpio_writel(msm_chip, msm_chip->int_enable[0], MSM_GPIO_INT_EN);
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
}
|
|
|
|
static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
|
|
{
|
|
unsigned long irq_flags;
|
|
struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
|
|
unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
|
|
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
|
|
if (on)
|
|
msm_chip->int_enable[1] |= BIT(offset);
|
|
else
|
|
msm_chip->int_enable[1] &= ~BIT(offset);
|
|
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
|
|
{
|
|
unsigned long irq_flags;
|
|
struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
|
|
unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
|
|
unsigned val, mask = BIT(offset);
|
|
|
|
spin_lock_irqsave(&msm_chip->lock, irq_flags);
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE);
|
|
if (flow_type & IRQ_TYPE_EDGE_BOTH) {
|
|
msm_gpio_writel(msm_chip, val | mask, MSM_GPIO_INT_EDGE);
|
|
__irq_set_handler_locked(d->irq, handle_edge_irq);
|
|
} else {
|
|
msm_gpio_writel(msm_chip, val & ~mask, MSM_GPIO_INT_EDGE);
|
|
__irq_set_handler_locked(d->irq, handle_level_irq);
|
|
}
|
|
if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
|
|
msm_chip->both_edge_detect |= mask;
|
|
msm_gpio_update_both_edge_detect(msm_chip);
|
|
} else {
|
|
msm_chip->both_edge_detect &= ~mask;
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_POS);
|
|
if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
|
|
val |= mask;
|
|
else
|
|
val &= ~mask;
|
|
msm_gpio_writel(msm_chip, val, MSM_GPIO_INT_POS);
|
|
}
|
|
spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
static void msm_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
int i, j, mask;
|
|
unsigned val;
|
|
|
|
for (i = 0; i < msm_gpio_count; i++) {
|
|
struct msm_gpio_chip *msm_chip = &msm_gpio_chips[i];
|
|
val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
|
|
val &= msm_chip->int_enable[0];
|
|
while (val) {
|
|
mask = val & -val;
|
|
j = fls(mask) - 1;
|
|
/* printk("%s %08x %08x bit %d gpio %d irq %d\n",
|
|
__func__, v, m, j, msm_chip->chip.start + j,
|
|
FIRST_GPIO_IRQ + msm_chip->chip.start + j); */
|
|
val &= ~mask;
|
|
generic_handle_irq(FIRST_GPIO_IRQ +
|
|
msm_chip->chip.base + j);
|
|
}
|
|
}
|
|
desc->irq_data.chip->irq_ack(&desc->irq_data);
|
|
}
|
|
|
|
static struct irq_chip msm_gpio_irq_chip = {
|
|
.name = "msmgpio",
|
|
.irq_ack = msm_gpio_irq_ack,
|
|
.irq_mask = msm_gpio_irq_mask,
|
|
.irq_unmask = msm_gpio_irq_unmask,
|
|
.irq_set_wake = msm_gpio_irq_set_wake,
|
|
.irq_set_type = msm_gpio_irq_set_type,
|
|
};
|
|
|
|
static int gpio_msm_v1_probe(struct platform_device *pdev)
|
|
{
|
|
int i, j = 0;
|
|
const struct platform_device_id *dev_id = platform_get_device_id(pdev);
|
|
struct msm_gpio_initdata *data;
|
|
int irq1, irq2;
|
|
struct resource *res;
|
|
void __iomem *base1, __iomem *base2;
|
|
|
|
data = (struct msm_gpio_initdata *)dev_id->driver_data;
|
|
msm_gpio_chips = data->chips;
|
|
msm_gpio_count = data->count;
|
|
|
|
irq1 = platform_get_irq(pdev, 0);
|
|
if (irq1 < 0)
|
|
return irq1;
|
|
|
|
irq2 = platform_get_irq(pdev, 1);
|
|
if (irq2 < 0)
|
|
return irq2;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base1 = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base1))
|
|
return PTR_ERR(base1);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
base2 = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base2))
|
|
return PTR_ERR(base2);
|
|
|
|
for (i = FIRST_GPIO_IRQ; i < FIRST_GPIO_IRQ + NR_GPIO_IRQS; i++) {
|
|
if (i - FIRST_GPIO_IRQ >=
|
|
msm_gpio_chips[j].chip.base +
|
|
msm_gpio_chips[j].chip.ngpio)
|
|
j++;
|
|
irq_set_chip_data(i, &msm_gpio_chips[j]);
|
|
irq_set_chip_and_handler(i, &msm_gpio_irq_chip,
|
|
handle_edge_irq);
|
|
set_irq_flags(i, IRQF_VALID);
|
|
}
|
|
|
|
for (i = 0; i < msm_gpio_count; i++) {
|
|
if (i == 1)
|
|
msm_gpio_chips[i].base = base2;
|
|
else
|
|
msm_gpio_chips[i].base = base1;
|
|
spin_lock_init(&msm_gpio_chips[i].lock);
|
|
msm_gpio_writel(&msm_gpio_chips[i], 0, MSM_GPIO_INT_EN);
|
|
gpiochip_add(&msm_gpio_chips[i].chip);
|
|
}
|
|
|
|
irq_set_chained_handler(irq1, msm_gpio_irq_handler);
|
|
irq_set_chained_handler(irq2, msm_gpio_irq_handler);
|
|
irq_set_irq_wake(irq1, 1);
|
|
irq_set_irq_wake(irq2, 1);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device_id gpio_msm_v1_device_ids[] = {
|
|
{ "gpio-msm-7201", (unsigned long)&msm_gpio_7x01_init },
|
|
{ "gpio-msm-7x30", (unsigned long)&msm_gpio_7x30_init },
|
|
{ "gpio-msm-8x50", (unsigned long)&msm_gpio_8x50_init },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, gpio_msm_v1_device_ids);
|
|
|
|
static struct platform_driver gpio_msm_v1_driver = {
|
|
.driver = {
|
|
.name = "gpio-msm-v1",
|
|
},
|
|
.probe = gpio_msm_v1_probe,
|
|
.id_table = gpio_msm_v1_device_ids,
|
|
};
|
|
|
|
static int __init gpio_msm_v1_init(void)
|
|
{
|
|
return platform_driver_register(&gpio_msm_v1_driver);
|
|
}
|
|
postcore_initcall(gpio_msm_v1_init);
|
|
MODULE_LICENSE("GPL v2");
|