Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * SPEAr Keyboard Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Based on omap-keypad driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2010 ST Microelectronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Rajeev Kumar <rajeevkumar.linux@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * This file is licensed under the terms of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * License version 2. This program is licensed "as is" without any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * warranty of any kind, whether express or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/pm_wakeup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/platform_data/keyboard-spear.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) /* Keyboard Registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define MODE_CTL_REG	0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define STATUS_REG	0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define DATA_REG	0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define INTR_MASK	0x54
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /* Register Values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define NUM_ROWS	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define NUM_COLS	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define MODE_CTL_PCLK_FREQ_SHIFT	9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define MODE_CTL_PCLK_FREQ_MSK		0x7F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define MODE_CTL_KEYBOARD	(0x2 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define MODE_CTL_SCAN_RATE_10	(0x0 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define MODE_CTL_SCAN_RATE_20	(0x1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define MODE_CTL_SCAN_RATE_40	(0x2 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define MODE_CTL_SCAN_RATE_80	(0x3 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define MODE_CTL_KEYNUM_SHIFT	6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define MODE_CTL_START_SCAN	(0x1 << 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define STATUS_DATA_AVAIL	(0x1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define DATA_ROW_MASK		0xF0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define DATA_COLUMN_MASK	0x0F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) #define ROW_SHIFT		4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) struct spear_kbd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	void __iomem *io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	unsigned int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	unsigned int suspended_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	unsigned short last_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned short keycodes[NUM_ROWS * NUM_COLS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	bool rep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	bool irq_wake_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	u32 mode_ctl_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct spear_kbd *kbd = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct input_dev *input = kbd->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned int key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	u32 sts, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	sts = readl_relaxed(kbd->io_base + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (!(sts & STATUS_DATA_AVAIL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (kbd->last_key != KEY_RESERVED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		input_report_key(input, kbd->last_key, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		kbd->last_key = KEY_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	/* following reads active (row, col) pair */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	val = readl_relaxed(kbd->io_base + DATA_REG) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		(DATA_ROW_MASK | DATA_COLUMN_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	key = kbd->keycodes[val];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	input_event(input, EV_MSC, MSC_SCAN, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	input_report_key(input, key, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	kbd->last_key = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	/* clear interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	writel_relaxed(0, kbd->io_base + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int spear_kbd_open(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct spear_kbd *kbd = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	kbd->last_key = KEY_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	error = clk_enable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	/* keyboard rate to be programmed is input clock (in MHz) - 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	val = clk_get_rate(kbd->clk) / 1000000 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	val = (val & MODE_CTL_PCLK_FREQ_MSK) << MODE_CTL_PCLK_FREQ_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	/* program keyboard */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	val = MODE_CTL_SCAN_RATE_80 | MODE_CTL_KEYBOARD | val |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		(kbd->mode << MODE_CTL_KEYNUM_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	writel_relaxed(1, kbd->io_base + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	/* start key scan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	val = readl_relaxed(kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	val |= MODE_CTL_START_SCAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static void spear_kbd_close(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct spear_kbd *kbd = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/* stop key scan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	val = readl_relaxed(kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	val &= ~MODE_CTL_START_SCAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	clk_disable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	kbd->last_key = KEY_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int spear_kbd_parse_dt(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)                                         struct spear_kbd *kbd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	u32 val, suspended_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (!np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		dev_err(&pdev->dev, "Missing DT data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (of_property_read_bool(np, "autorepeat"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		kbd->rep = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (of_property_read_u32(np, "suspended_rate", &suspended_rate))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		kbd->suspended_rate = suspended_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	error = of_property_read_u32(np, "st,mode", &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		dev_err(&pdev->dev, "DT: Invalid or missing mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	kbd->mode = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static inline int spear_kbd_parse_dt(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				     struct spear_kbd *kbd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static int spear_kbd_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct kbd_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	const struct matrix_keymap_data *keymap = pdata ? pdata->keymap : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct spear_kbd *kbd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	kbd = devm_kzalloc(&pdev->dev, sizeof(*kbd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (!kbd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		dev_err(&pdev->dev, "not enough memory for driver data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	input_dev = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (!input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		dev_err(&pdev->dev, "unable to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	kbd->input = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	kbd->irq = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		error = spear_kbd_parse_dt(pdev, kbd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		kbd->mode = pdata->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		kbd->rep = pdata->rep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		kbd->suspended_rate = pdata->suspended_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	kbd->io_base = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (IS_ERR(kbd->io_base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		return PTR_ERR(kbd->io_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	kbd->clk = devm_clk_get(&pdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	if (IS_ERR(kbd->clk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		return PTR_ERR(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	input_dev->name = "Spear Keyboard";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	input_dev->phys = "keyboard/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	input_dev->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	input_dev->id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	input_dev->id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	input_dev->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	input_dev->open = spear_kbd_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	input_dev->close = spear_kbd_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	error = matrix_keypad_build_keymap(keymap, NULL, NUM_ROWS, NUM_COLS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 					   kbd->keycodes, input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		dev_err(&pdev->dev, "Failed to build keymap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if (kbd->rep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		__set_bit(EV_REP, input_dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	input_set_drvdata(input_dev, kbd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	error = devm_request_irq(&pdev->dev, irq, spear_kbd_interrupt, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			"keyboard", kbd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		dev_err(&pdev->dev, "request_irq failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	error = clk_prepare(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	error = input_register_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		dev_err(&pdev->dev, "Unable to register keyboard device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		clk_unprepare(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	platform_set_drvdata(pdev, kbd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int spear_kbd_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	struct spear_kbd *kbd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	input_unregister_device(kbd->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	clk_unprepare(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static int __maybe_unused spear_kbd_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct spear_kbd *kbd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	struct input_dev *input_dev = kbd->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	unsigned int rate = 0, mode_ctl_reg, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	mutex_lock(&input_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	/* explicitly enable clock as we may program device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	clk_enable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	mode_ctl_reg = readl_relaxed(kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		if (!enable_irq_wake(kbd->irq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			kbd->irq_wake_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		 * reprogram the keyboard operating frequency as on some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		 * platform it may change during system suspended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		if (kbd->suspended_rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 			rate = kbd->suspended_rate / 1000000 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			rate = clk_get_rate(kbd->clk) / 1000000 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		val = mode_ctl_reg &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			~(MODE_CTL_PCLK_FREQ_MSK << MODE_CTL_PCLK_FREQ_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		val |= (rate & MODE_CTL_PCLK_FREQ_MSK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 			<< MODE_CTL_PCLK_FREQ_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		writel_relaxed(val, kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		if (input_dev->users) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 			writel_relaxed(mode_ctl_reg & ~MODE_CTL_START_SCAN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 					kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			clk_disable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	/* store current configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	if (input_dev->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		kbd->mode_ctl_reg = mode_ctl_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	/* restore previous clk state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	clk_disable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	mutex_unlock(&input_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static int __maybe_unused spear_kbd_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	struct spear_kbd *kbd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	struct input_dev *input_dev = kbd->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	mutex_lock(&input_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		if (kbd->irq_wake_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 			kbd->irq_wake_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 			disable_irq_wake(kbd->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		if (input_dev->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 			clk_enable(kbd->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	/* restore current configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	if (input_dev->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		writel_relaxed(kbd->mode_ctl_reg, kbd->io_base + MODE_CTL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	mutex_unlock(&input_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops, spear_kbd_suspend, spear_kbd_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static const struct of_device_id spear_kbd_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	{ .compatible = "st,spear300-kbd" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) MODULE_DEVICE_TABLE(of, spear_kbd_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) static struct platform_driver spear_kbd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	.probe		= spear_kbd_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	.remove		= spear_kbd_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		.name	= "keyboard",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		.pm	= &spear_kbd_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		.of_match_table = of_match_ptr(spear_kbd_id_table),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) module_platform_driver(spear_kbd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) MODULE_AUTHOR("Rajeev Kumar");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) MODULE_DESCRIPTION("SPEAr Keyboard Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) MODULE_LICENSE("GPL");