| Message ID | 1349089310-22134-1-git-send-email-sourav.poddar@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Monday 01 October 2012 04:31 PM, Sourav Poddar wrote: > +smsc_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct smsc *smsc = dev_get_drvdata(pdev->dev.parent); > + struct input_dev *input; > + struct smsc_keypad *kp; > + int ret = 0, error; > + int col, i, max_keys, row_shift; > + int irq; > + int addr; > + > + kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL); > + > + input = input_allocate_device(); > + if (!kp || !input) { > + error = -ENOMEM; > + goto err1; > + } > + > + error = smsc_keypad_parse_dt(&pdev->dev, kp); > + if (error) > + return error; > Are we leaking input here?
Hi Sourav, On Mon, Oct 01, 2012 at 04:31:50PM +0530, Sourav Poddar wrote: > From: G, Manjunath Kondaiah <manjugk@ti.com> > > SMSC ECE1099 is a keyboard scan or GPIO expansion device.The device > supports a keypad scan matrix of 23*8.This driver uses this > device as a keypad driver. > > Tested on omap5430 evm with 3.6-rc6 custom kernel. > > Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> > Cc: Benoit Cousson <b-cousson@ti.com> > Cc: Felipe Balbi <balbi@ti.com> > Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> > Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com> > Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> > Acked-by: Felipe Balbi <balbi@ti.com> > --- > Changes since v2: > - Replace magic numbers through driver variable. > - Provide comments for some initialisation done in probe. > drivers/input/keyboard/Kconfig | 11 + > drivers/input/keyboard/Makefile | 1 + > drivers/input/keyboard/smsc-ece1099-keypad.c | 304 ++++++++++++++++++++++++++ > 3 files changed, 316 insertions(+), 0 deletions(-) > create mode 100644 drivers/input/keyboard/smsc-ece1099-keypad.c > > diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig > index c50fa75..b03a39c 100644 > --- a/drivers/input/keyboard/Kconfig > +++ b/drivers/input/keyboard/Kconfig > @@ -593,6 +593,17 @@ config KEYBOARD_TWL4030 > To compile this driver as a module, choose M here: the > module will be called twl4030_keypad. > > +config KEYBOARD_SMSC > + tristate "SMSC ECE1099 keypad support" Should also select INPUT_MATRIXKMAP. > + depends on I2C > + help > + Say Y here if your board use the smsc keypad controller > + for omap5 defconfig. It's safe to say enable this > + even on boards that don't use the keypad controller. > + > + To compile this driver as a module, choose M here: the > + module will be called smsc-ece1099-keypad. > + > config KEYBOARD_XTKBD > tristate "XT keyboard" > select SERIO > diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile > index 44e7600..0f2aa26 100644 > --- a/drivers/input/keyboard/Makefile > +++ b/drivers/input/keyboard/Makefile > @@ -52,5 +52,6 @@ obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o > obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o > obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o > obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o > +obj-$(CONFIG_KEYBOARD_SMSC) += smsc-ece1099-keypad.o > obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o > obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o > diff --git a/drivers/input/keyboard/smsc-ece1099-keypad.c b/drivers/input/keyboard/smsc-ece1099-keypad.c > new file mode 100644 > index 0000000..15dc147 > --- /dev/null > +++ b/drivers/input/keyboard/smsc-ece1099-keypad.c > @@ -0,0 +1,304 @@ > +/* > + * SMSC_ECE1099 Keypad driver > + * > + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/i2c.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/init.h> > +#include <linux/interrupt.h> > +#include <linux/input.h> > +#include <linux/gpio.h> > +#include <linux/slab.h> > +#include <linux/jiffies.h> > +#include <linux/input/matrix_keypad.h> > +#include <linux/delay.h> > +#include <linux/mfd/core.h> > +#include <linux/mfd/smsc.h> > +#include <linux/of_gpio.h> > +#include <linux/of.h> > + > +#define KEYPRESS_TIME 200 > + > +struct smsc_keypad { > + struct smsc *smsc; > + struct matrix_keymap_data *keymap_data; > + unsigned int last_key_state[16]; > + unsigned int last_col; > + unsigned int last_key_ms[16]; > + unsigned short *keymap; > + struct i2c_client *client; > + struct input_dev *input; > + int rows, cols; > + int row_shift; > + bool no_autorepeat; > + unsigned irq; > + struct device *dev; > +}; > + > +static void smsc_kp_scan(struct smsc_keypad *kp) > +{ > + struct input_dev *input = kp->input; > + int i, j; > + int row, col; > + int temp, code; > + unsigned int new_state[16]; > + unsigned int bits_changed; > + int this_ms; > + > + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0x00); > + smsc_write(kp->dev, SMSC_KP_INT_STAT, 0xFF); > + > + /* Scan for row and column */ > + for (i = 0; i < kp->cols; i++) { > + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_EVAL + i); > + /* Read Row Status */ > + smsc_read(kp->dev, SMSC_KP_IN, &temp); > + if (temp == 0xFF) > + continue; > + > + col = i; > + for (j = 0; j < kp->rows; j++) { > + if ((temp & 0x01) != 0x00) { > + temp = temp >> 1; > + continue; > + } > + > + row = j; > + new_state[col] = (1 << row); > + bits_changed = kp->last_key_state[col] ^ new_state[col]; > + this_ms = jiffies_to_msecs(jiffies); > + if (bits_changed != 0 || (!bits_changed && > + ((this_ms - kp->last_key_ms[col]) >= KEYPRESS_TIME))) { > + code = MATRIX_SCAN_CODE(row, col, kp->row_shift); > + input_event(input, EV_MSC, MSC_SCAN, code); > + input_report_key(input, kp->keymap[code], 1); > + input_report_key(input, kp->keymap[code], 0); > + kp->last_key_state[col] = new_state[col]; > + if (kp->last_col != col) > + kp->last_key_state[kp->last_col] = 0; > + kp->last_key_ms[col] = this_ms; > + } > + temp = temp >> 1; > + } > + } > + input_sync(input); > + > + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0xFF); > + > + /* Set up Low Power Mode (Wake-up) (0xFB) */ > + smsc_write(kp->dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); > + > + /*Enable Keypad Scan (generate interrupt on key press) (0x40)*/ > + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); > +} > + > +static irqreturn_t do_kp_irq(int irq, void *_kp) > +{ > + struct smsc_keypad *kp = _kp; > + int int_status; > + > + smsc_read(kp->dev, SMSC_KP_INT_STAT, &int_status); > + if (int_status) > + smsc_kp_scan(kp); > + > + return IRQ_HANDLED; > +} > + > +#ifdef CONFIG_OF > +static int __devinit smsc_keypad_parse_dt(struct device *dev, > + struct smsc_keypad *kp) > +{ > + struct device_node *np = dev->of_node; > + > + if (!np) { > + dev_err(dev, "missing DT data"); > + return -EINVAL; > + } > + > + of_property_read_u32(np, "keypad,num-rows", &kp->rows); > + of_property_read_u32(np, "keypad,num-columns", &kp->cols); > + if (!kp->rows || !kp->cols) { > + dev_err(dev, "number of keypad rows/columns not specified\n"); > + return -EINVAL; > + } > + > + if (of_property_read_bool(np, "linux,input-no-autorepeat")) > + kp->no_autorepeat = true; > + > + return 0; > +} > +#else > +static inline int smsc_keypad_parse_dt(struct device *dev, > + struct smsc_keypad *kp) > +{ > + return -ENOSYS; > +} > +#endif > + > +static int __devinit > +smsc_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct smsc *smsc = dev_get_drvdata(pdev->dev.parent); > + struct input_dev *input; > + struct smsc_keypad *kp; > + int ret = 0, error; > + int col, i, max_keys, row_shift; > + int irq; > + int addr; > + > + kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL); > + > + input = input_allocate_device(); > + if (!kp || !input) { > + error = -ENOMEM; > + goto err1; > + } > + > + error = smsc_keypad_parse_dt(&pdev->dev, kp); It doe snot look like the driver is useful without DT... Should it simply depend on OF and not even provide !OF stubs? > + if (error) You are leaking input device here. > + return error; > + > + /* Get the debug Device */ > + kp->input = input; > + kp->smsc = smsc; > + kp->irq = platform_get_irq(pdev, 0); > + kp->dev = dev; > + > + for (col = 0; col < 16; col++) { > + kp->last_key_state[col] = 0; > + kp->last_key_ms[col] = 0; kzalloc should have already taken care of this. > + } > + > + /* setup input device */ > + __set_bit(EV_KEY, input->evbit); > + > + /* Enable auto repeat feature of Linux input subsystem */ > + if (!(kp->no_autorepeat)) No need for extra parenthesis. > + __set_bit(EV_REP, input->evbit); > + > + input_set_capability(input, EV_MSC, MSC_SCAN); > + input->name = "SMSC Keypad"; > + input->phys = "smsc_keypad/input0"; > + input->dev.parent = &pdev->dev; > + input->id.bustype = BUS_HOST; > + input->id.vendor = 0x0001; > + input->id.product = 0x0001; > + input->id.version = 0x0003; > + > + error = input_register_device(input); > + if (error) { > + dev_err(kp->dev, > + "Unable to register twl4030 keypad device\n"); > + goto err1; > + } > + > + /* Mask all GPIO interrupts (0x37-0x3B) */ > + for (addr = SMSC_GPIO_INT_MASK_START; > + addr < SMSC_GPIO_INT_MASK_START + 4; addr++) > + smsc_write(dev, addr, 0); > + > + /* Set all outputs high (0x05-0x09) */ > + for (addr = SMSC_GPIO_DATA_OUT_START; > + addr < SMSC_GPIO_DATA_OUT_START + 4; addr++) > + smsc_write(dev, addr, 0xff); > + > + /* Clear all GPIO interrupts (0x32-0x36) */ > + for (addr = SMSC_GPIO_INT_STAT_START; > + addr < SMSC_GPIO_INT_STAT_START + 4; addr++) > + smsc_write(dev, addr, 0xff); > + > + /* Configure the smsc pins as Keyboard scan Input */ > + for (i = 0; i <= kp->rows; i++) { > + addr = 0x12 + i; > + smsc_write(dev, addr, SMSC_KP_KSI); > + } > + > + /* Configure the smsc pins as Keyboard scan output */ > + for (i = 0; i <= kp->cols; i++) { > + addr = 0x1A + i; > + smsc_write(dev, addr, SMSC_KP_KSO); > + } > + > + smsc_write(dev, SMSC_KP_INT_STAT, SMSC_KP_SET_HIGH); > + smsc_write(dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); > + smsc_write(dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); > + > + row_shift = get_count_order(kp->cols); > + max_keys = kp->rows << row_shift; > + > + kp->row_shift = row_shift; > + kp->keymap = devm_kzalloc(dev, max_keys * sizeof(kp->keymap[0]), > + GFP_KERNEL); > + if (!kp->keymap) { > + dev_err(&pdev->dev, "Not enough memory for keymap\n"); > + error = -ENOMEM; > + } > + > + matrix_keypad_build_keymap(NULL, NULL, kp->rows, > + kp->cols, kp->keymap, input); Needs error handling I believe. > + > + /* > + * This ISR will always execute in kernel thread context because of > + * the need to access the SMSC over the I2C bus. > + */ > + ret = devm_request_threaded_irq(dev, kp->irq, NULL, do_kp_irq, > + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, pdev->name, kp); > + if (ret) { > + dev_dbg(&pdev->dev, "request_irq failed for irq no=%d\n", > + irq); > + goto err2; > + } > + > + /* Enable smsc keypad interrupts */ > + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff); > + if (ret < 0) > + goto err2; > + > + return 0; > + > +err2: > + input_unregister_device(input); > +err1: > + input_free_device(input); Double free. > + return ret; > +} > + > +static int __devexit smsc_remove(struct platform_device *pdev) > +{ > + struct smsc_keypad *kp = platform_get_drvdata(pdev); > + input_unregister_device(kp->input); And your kernel goes *BOOM* > + > + return 0; > +} > + > +#ifdef CONFIG_OF > +static const struct of_device_id smsc_keypad_dt_match[] = { > + { .compatible = "smsc,keypad" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, smsc_keypad_dt_match); > +#endif > + > +static struct platform_driver smsc_driver = { > + .driver = { > + .name = "smsc-keypad", > + .of_match_table = of_match_ptr(smsc_keypad_dt_match), > + .owner = THIS_MODULE, > + }, > + .probe = smsc_probe, > + .remove = __devexit_p(smsc_remove), > +}; > + > +module_platform_driver(smsc_driver); > + > +MODULE_AUTHOR("G Kondaiah Manjunath <manjugk@ti.com>"); > +MODULE_DESCRIPTION("SMSC ECE1099 Keypad driver"); > +MODULE_LICENSE("GPL v2"); > -- > 1.7.1 > Thanks.
Hi Dmitry, On Tue, Oct 2, 2012 at 11:48 AM, Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > Hi Sourav, > > On Mon, Oct 01, 2012 at 04:31:50PM +0530, Sourav Poddar wrote: >> From: G, Manjunath Kondaiah <manjugk@ti.com> >> >> SMSC ECE1099 is a keyboard scan or GPIO expansion device.The device >> supports a keypad scan matrix of 23*8.This driver uses this >> device as a keypad driver. >> >> Tested on omap5430 evm with 3.6-rc6 custom kernel. >> >> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> >> Cc: Benoit Cousson <b-cousson@ti.com> >> Cc: Felipe Balbi <balbi@ti.com> >> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> >> Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com> >> Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> >> Acked-by: Felipe Balbi <balbi@ti.com> >> --- >> Changes since v2: >> - Replace magic numbers through driver variable. >> - Provide comments for some initialisation done in probe. >> drivers/input/keyboard/Kconfig | 11 + >> drivers/input/keyboard/Makefile | 1 + >> drivers/input/keyboard/smsc-ece1099-keypad.c | 304 ++++++++++++++++++++++++++ >> 3 files changed, 316 insertions(+), 0 deletions(-) >> create mode 100644 drivers/input/keyboard/smsc-ece1099-keypad.c >> >> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig >> index c50fa75..b03a39c 100644 >> --- a/drivers/input/keyboard/Kconfig >> +++ b/drivers/input/keyboard/Kconfig >> @@ -593,6 +593,17 @@ config KEYBOARD_TWL4030 >> To compile this driver as a module, choose M here: the >> module will be called twl4030_keypad. >> >> +config KEYBOARD_SMSC >> + tristate "SMSC ECE1099 keypad support" > > Should also select INPUT_MATRIXKMAP. > Yes, will include in the next version. >> + depends on I2C >> + help >> + Say Y here if your board use the smsc keypad controller >> + for omap5 defconfig. It's safe to say enable this >> + even on boards that don't use the keypad controller. >> + >> + To compile this driver as a module, choose M here: the >> + module will be called smsc-ece1099-keypad. >> + >> config KEYBOARD_XTKBD >> tristate "XT keyboard" >> select SERIO >> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile >> index 44e7600..0f2aa26 100644 >> --- a/drivers/input/keyboard/Makefile >> +++ b/drivers/input/keyboard/Makefile >> @@ -52,5 +52,6 @@ obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o >> obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o >> obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o >> obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o >> +obj-$(CONFIG_KEYBOARD_SMSC) += smsc-ece1099-keypad.o >> obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o >> obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o >> diff --git a/drivers/input/keyboard/smsc-ece1099-keypad.c b/drivers/input/keyboard/smsc-ece1099-keypad.c >> new file mode 100644 >> index 0000000..15dc147 >> --- /dev/null >> +++ b/drivers/input/keyboard/smsc-ece1099-keypad.c >> @@ -0,0 +1,304 @@ >> +/* >> + * SMSC_ECE1099 Keypad driver >> + * >> + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#include <linux/i2c.h> >> +#include <linux/kernel.h> >> +#include <linux/module.h> >> +#include <linux/init.h> >> +#include <linux/interrupt.h> >> +#include <linux/input.h> >> +#include <linux/gpio.h> >> +#include <linux/slab.h> >> +#include <linux/jiffies.h> >> +#include <linux/input/matrix_keypad.h> >> +#include <linux/delay.h> >> +#include <linux/mfd/core.h> >> +#include <linux/mfd/smsc.h> >> +#include <linux/of_gpio.h> >> +#include <linux/of.h> >> + >> +#define KEYPRESS_TIME 200 >> + >> +struct smsc_keypad { >> + struct smsc *smsc; >> + struct matrix_keymap_data *keymap_data; >> + unsigned int last_key_state[16]; >> + unsigned int last_col; >> + unsigned int last_key_ms[16]; >> + unsigned short *keymap; >> + struct i2c_client *client; >> + struct input_dev *input; >> + int rows, cols; >> + int row_shift; >> + bool no_autorepeat; >> + unsigned irq; >> + struct device *dev; >> +}; >> + >> +static void smsc_kp_scan(struct smsc_keypad *kp) >> +{ >> + struct input_dev *input = kp->input; >> + int i, j; >> + int row, col; >> + int temp, code; >> + unsigned int new_state[16]; >> + unsigned int bits_changed; >> + int this_ms; >> + >> + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0x00); >> + smsc_write(kp->dev, SMSC_KP_INT_STAT, 0xFF); >> + >> + /* Scan for row and column */ >> + for (i = 0; i < kp->cols; i++) { >> + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_EVAL + i); >> + /* Read Row Status */ >> + smsc_read(kp->dev, SMSC_KP_IN, &temp); >> + if (temp == 0xFF) >> + continue; >> + >> + col = i; >> + for (j = 0; j < kp->rows; j++) { >> + if ((temp & 0x01) != 0x00) { >> + temp = temp >> 1; >> + continue; >> + } >> + >> + row = j; >> + new_state[col] = (1 << row); >> + bits_changed = kp->last_key_state[col] ^ new_state[col]; >> + this_ms = jiffies_to_msecs(jiffies); >> + if (bits_changed != 0 || (!bits_changed && >> + ((this_ms - kp->last_key_ms[col]) >= KEYPRESS_TIME))) { >> + code = MATRIX_SCAN_CODE(row, col, kp->row_shift); >> + input_event(input, EV_MSC, MSC_SCAN, code); >> + input_report_key(input, kp->keymap[code], 1); >> + input_report_key(input, kp->keymap[code], 0); >> + kp->last_key_state[col] = new_state[col]; >> + if (kp->last_col != col) >> + kp->last_key_state[kp->last_col] = 0; >> + kp->last_key_ms[col] = this_ms; >> + } >> + temp = temp >> 1; >> + } >> + } >> + input_sync(input); >> + >> + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0xFF); >> + >> + /* Set up Low Power Mode (Wake-up) (0xFB) */ >> + smsc_write(kp->dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); >> + >> + /*Enable Keypad Scan (generate interrupt on key press) (0x40)*/ >> + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); >> +} >> + >> +static irqreturn_t do_kp_irq(int irq, void *_kp) >> +{ >> + struct smsc_keypad *kp = _kp; >> + int int_status; >> + >> + smsc_read(kp->dev, SMSC_KP_INT_STAT, &int_status); >> + if (int_status) >> + smsc_kp_scan(kp); >> + >> + return IRQ_HANDLED; >> +} >> + >> +#ifdef CONFIG_OF >> +static int __devinit smsc_keypad_parse_dt(struct device *dev, >> + struct smsc_keypad *kp) >> +{ >> + struct device_node *np = dev->of_node; >> + >> + if (!np) { >> + dev_err(dev, "missing DT data"); >> + return -EINVAL; >> + } >> + >> + of_property_read_u32(np, "keypad,num-rows", &kp->rows); >> + of_property_read_u32(np, "keypad,num-columns", &kp->cols); >> + if (!kp->rows || !kp->cols) { >> + dev_err(dev, "number of keypad rows/columns not specified\n"); >> + return -EINVAL; >> + } >> + >> + if (of_property_read_bool(np, "linux,input-no-autorepeat")) >> + kp->no_autorepeat = true; >> + >> + return 0; >> +} >> +#else >> +static inline int smsc_keypad_parse_dt(struct device *dev, >> + struct smsc_keypad *kp) >> +{ >> + return -ENOSYS; >> +} >> +#endif >> + >> +static int __devinit >> +smsc_probe(struct platform_device *pdev) >> +{ >> + struct device *dev = &pdev->dev; >> + struct smsc *smsc = dev_get_drvdata(pdev->dev.parent); >> + struct input_dev *input; >> + struct smsc_keypad *kp; >> + int ret = 0, error; >> + int col, i, max_keys, row_shift; >> + int irq; >> + int addr; >> + >> + kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL); >> + >> + input = input_allocate_device(); >> + if (!kp || !input) { >> + error = -ENOMEM; >> + goto err1; >> + } >> + >> + error = smsc_keypad_parse_dt(&pdev->dev, kp); > > It doe snot look like the driver is useful without DT... Should it > simply depend on OF and not even provide !OF stubs? > Yes, the idea was to make this driver completely dt specific. >> + if (error) > > You are leaking input device here. > True, will include appropriate goto label. >> + return error; >> + >> + /* Get the debug Device */ >> + kp->input = input; >> + kp->smsc = smsc; >> + kp->irq = platform_get_irq(pdev, 0); >> + kp->dev = dev; >> + >> + for (col = 0; col < 16; col++) { >> + kp->last_key_state[col] = 0; >> + kp->last_key_ms[col] = 0; > > kzalloc should have already taken care of this. > Ok. Will remove. >> + } >> + >> + /* setup input device */ >> + __set_bit(EV_KEY, input->evbit); >> + >> + /* Enable auto repeat feature of Linux input subsystem */ >> + if (!(kp->no_autorepeat)) > > No need for extra parenthesis. > Will remove. >> + __set_bit(EV_REP, input->evbit); >> + >> + input_set_capability(input, EV_MSC, MSC_SCAN); >> + input->name = "SMSC Keypad"; >> + input->phys = "smsc_keypad/input0"; >> + input->dev.parent = &pdev->dev; >> + input->id.bustype = BUS_HOST; >> + input->id.vendor = 0x0001; >> + input->id.product = 0x0001; >> + input->id.version = 0x0003; >> + >> + error = input_register_device(input); >> + if (error) { >> + dev_err(kp->dev, >> + "Unable to register twl4030 keypad device\n"); >> + goto err1; >> + } >> + >> + /* Mask all GPIO interrupts (0x37-0x3B) */ >> + for (addr = SMSC_GPIO_INT_MASK_START; >> + addr < SMSC_GPIO_INT_MASK_START + 4; addr++) >> + smsc_write(dev, addr, 0); >> + >> + /* Set all outputs high (0x05-0x09) */ >> + for (addr = SMSC_GPIO_DATA_OUT_START; >> + addr < SMSC_GPIO_DATA_OUT_START + 4; addr++) >> + smsc_write(dev, addr, 0xff); >> + >> + /* Clear all GPIO interrupts (0x32-0x36) */ >> + for (addr = SMSC_GPIO_INT_STAT_START; >> + addr < SMSC_GPIO_INT_STAT_START + 4; addr++) >> + smsc_write(dev, addr, 0xff); >> + >> + /* Configure the smsc pins as Keyboard scan Input */ >> + for (i = 0; i <= kp->rows; i++) { >> + addr = 0x12 + i; >> + smsc_write(dev, addr, SMSC_KP_KSI); >> + } >> + >> + /* Configure the smsc pins as Keyboard scan output */ >> + for (i = 0; i <= kp->cols; i++) { >> + addr = 0x1A + i; >> + smsc_write(dev, addr, SMSC_KP_KSO); >> + } >> + >> + smsc_write(dev, SMSC_KP_INT_STAT, SMSC_KP_SET_HIGH); >> + smsc_write(dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); >> + smsc_write(dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); >> + >> + row_shift = get_count_order(kp->cols); >> + max_keys = kp->rows << row_shift; >> + >> + kp->row_shift = row_shift; >> + kp->keymap = devm_kzalloc(dev, max_keys * sizeof(kp->keymap[0]), >> + GFP_KERNEL); >> + if (!kp->keymap) { >> + dev_err(&pdev->dev, "Not enough memory for keymap\n"); >> + error = -ENOMEM; >> + } >> + >> + matrix_keypad_build_keymap(NULL, NULL, kp->rows, >> + kp->cols, kp->keymap, input); > > Needs error handling I believe. > True, missed that. Will include. >> + >> + /* >> + * This ISR will always execute in kernel thread context because of >> + * the need to access the SMSC over the I2C bus. >> + */ >> + ret = devm_request_threaded_irq(dev, kp->irq, NULL, do_kp_irq, >> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, pdev->name, kp); >> + if (ret) { >> + dev_dbg(&pdev->dev, "request_irq failed for irq no=%d\n", >> + irq); >> + goto err2; >> + } >> + >> + /* Enable smsc keypad interrupts */ >> + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff); >> + if (ret < 0) >> + goto err2; >> + >> + return 0; >> + >> +err2: >> + input_unregister_device(input); >> +err1: >> + input_free_device(input); > > Double free. > I believe what you are trying to say here is that we dont really need a " input_unregister_device" (as also I checked in other keypad implementations) and do a "unregister_device" in the remove api ?? >> + return ret; >> +} >> + >> +static int __devexit smsc_remove(struct platform_device *pdev) >> +{ >> + struct smsc_keypad *kp = platform_get_drvdata(pdev); >> + input_unregister_device(kp->input); > > And your kernel goes *BOOM* > >> + >> + return 0; >> +} >> + >> +#ifdef CONFIG_OF >> +static const struct of_device_id smsc_keypad_dt_match[] = { >> + { .compatible = "smsc,keypad" }, >> + {}, >> +}; >> +MODULE_DEVICE_TABLE(of, smsc_keypad_dt_match); >> +#endif >> + >> +static struct platform_driver smsc_driver = { >> + .driver = { >> + .name = "smsc-keypad", >> + .of_match_table = of_match_ptr(smsc_keypad_dt_match), >> + .owner = THIS_MODULE, >> + }, >> + .probe = smsc_probe, >> + .remove = __devexit_p(smsc_remove), >> +}; >> + >> +module_platform_driver(smsc_driver); >> + >> +MODULE_AUTHOR("G Kondaiah Manjunath <manjugk@ti.com>"); >> +MODULE_DESCRIPTION("SMSC ECE1099 Keypad driver"); >> +MODULE_LICENSE("GPL v2"); >> -- >> 1.7.1 >> > > Thanks. > > -- > Dmitry
On Wed, Oct 03, 2012 at 11:26:46AM +0530, Poddar, Sourav wrote: > Hi Dmitry, > > On Tue, Oct 2, 2012 at 11:48 AM, Dmitry Torokhov > <dmitry.torokhov@gmail.com> wrote: > > Hi Sourav, > > > > On Mon, Oct 01, 2012 at 04:31:50PM +0530, Sourav Poddar wrote: > >> From: G, Manjunath Kondaiah <manjugk@ti.com> > >> > >> + > >> + /* Enable smsc keypad interrupts */ > >> + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff); > >> + if (ret < 0) > >> + goto err2; > >> + > >> + return 0; > >> + > >> +err2: > >> + input_unregister_device(input); > >> +err1: > >> + input_free_device(input); > > > > Double free. > > > I believe what you are trying to say here is that we dont really > need a " input_unregister_device" (as also I checked in other keypad > implementations) and do a "unregister_device" in the remove api ?? What I was trying to say is that if input device has been registered then you need to call input_unregister_device() to unregister and free it, otherwise you need to call input_free_device(), but not both. Thanks.
Hi Dmitry, On Thursday 04 October 2012 12:54 PM, Dmitry Torokhov wrote: > On Wed, Oct 03, 2012 at 11:26:46AM +0530, Poddar, Sourav wrote: >> Hi Dmitry, >> >> On Tue, Oct 2, 2012 at 11:48 AM, Dmitry Torokhov >> <dmitry.torokhov@gmail.com> wrote: >>> Hi Sourav, >>> >>> On Mon, Oct 01, 2012 at 04:31:50PM +0530, Sourav Poddar wrote: >>>> From: G, Manjunath Kondaiah <manjugk@ti.com> >>>> >>>> + >>>> + /* Enable smsc keypad interrupts */ >>>> + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff); >>>> + if (ret < 0) >>>> + goto err2; >>>> + >>>> + return 0; >>>> + >>>> +err2: >>>> + input_unregister_device(input); >>>> +err1: >>>> + input_free_device(input); >>> Double free. >>> >> I believe what you are trying to say here is that we dont really >> need a " input_unregister_device" (as also I checked in other keypad >> implementations) and do a "unregister_device" in the remove api ?? > What I was trying to say is that if input device has been registered > then you need to call input_unregister_device() to unregister and free > it, otherwise you need to call input_free_device(), but not both. > > Thanks. Ok. Thanks for the clarification. Will update and post a new version. ~Sourav
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index c50fa75..b03a39c 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -593,6 +593,17 @@ config KEYBOARD_TWL4030 To compile this driver as a module, choose M here: the module will be called twl4030_keypad. +config KEYBOARD_SMSC + tristate "SMSC ECE1099 keypad support" + depends on I2C + help + Say Y here if your board use the smsc keypad controller + for omap5 defconfig. It's safe to say enable this + even on boards that don't use the keypad controller. + + To compile this driver as a module, choose M here: the + module will be called smsc-ece1099-keypad. + config KEYBOARD_XTKBD tristate "XT keyboard" select SERIO diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 44e7600..0f2aa26 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -52,5 +52,6 @@ obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o +obj-$(CONFIG_KEYBOARD_SMSC) += smsc-ece1099-keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o diff --git a/drivers/input/keyboard/smsc-ece1099-keypad.c b/drivers/input/keyboard/smsc-ece1099-keypad.c new file mode 100644 index 0000000..15dc147 --- /dev/null +++ b/drivers/input/keyboard/smsc-ece1099-keypad.c @@ -0,0 +1,304 @@ +/* + * SMSC_ECE1099 Keypad driver + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/gpio.h> +#include <linux/slab.h> +#include <linux/jiffies.h> +#include <linux/input/matrix_keypad.h> +#include <linux/delay.h> +#include <linux/mfd/core.h> +#include <linux/mfd/smsc.h> +#include <linux/of_gpio.h> +#include <linux/of.h> + +#define KEYPRESS_TIME 200 + +struct smsc_keypad { + struct smsc *smsc; + struct matrix_keymap_data *keymap_data; + unsigned int last_key_state[16]; + unsigned int last_col; + unsigned int last_key_ms[16]; + unsigned short *keymap; + struct i2c_client *client; + struct input_dev *input; + int rows, cols; + int row_shift; + bool no_autorepeat; + unsigned irq; + struct device *dev; +}; + +static void smsc_kp_scan(struct smsc_keypad *kp) +{ + struct input_dev *input = kp->input; + int i, j; + int row, col; + int temp, code; + unsigned int new_state[16]; + unsigned int bits_changed; + int this_ms; + + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0x00); + smsc_write(kp->dev, SMSC_KP_INT_STAT, 0xFF); + + /* Scan for row and column */ + for (i = 0; i < kp->cols; i++) { + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_EVAL + i); + /* Read Row Status */ + smsc_read(kp->dev, SMSC_KP_IN, &temp); + if (temp == 0xFF) + continue; + + col = i; + for (j = 0; j < kp->rows; j++) { + if ((temp & 0x01) != 0x00) { + temp = temp >> 1; + continue; + } + + row = j; + new_state[col] = (1 << row); + bits_changed = kp->last_key_state[col] ^ new_state[col]; + this_ms = jiffies_to_msecs(jiffies); + if (bits_changed != 0 || (!bits_changed && + ((this_ms - kp->last_key_ms[col]) >= KEYPRESS_TIME))) { + code = MATRIX_SCAN_CODE(row, col, kp->row_shift); + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, kp->keymap[code], 1); + input_report_key(input, kp->keymap[code], 0); + kp->last_key_state[col] = new_state[col]; + if (kp->last_col != col) + kp->last_key_state[kp->last_col] = 0; + kp->last_key_ms[col] = this_ms; + } + temp = temp >> 1; + } + } + input_sync(input); + + smsc_write(kp->dev, SMSC_KP_INT_MASK, 0xFF); + + /* Set up Low Power Mode (Wake-up) (0xFB) */ + smsc_write(kp->dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); + + /*Enable Keypad Scan (generate interrupt on key press) (0x40)*/ + smsc_write(kp->dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); +} + +static irqreturn_t do_kp_irq(int irq, void *_kp) +{ + struct smsc_keypad *kp = _kp; + int int_status; + + smsc_read(kp->dev, SMSC_KP_INT_STAT, &int_status); + if (int_status) + smsc_kp_scan(kp); + + return IRQ_HANDLED; +} + +#ifdef CONFIG_OF +static int __devinit smsc_keypad_parse_dt(struct device *dev, + struct smsc_keypad *kp) +{ + struct device_node *np = dev->of_node; + + if (!np) { + dev_err(dev, "missing DT data"); + return -EINVAL; + } + + of_property_read_u32(np, "keypad,num-rows", &kp->rows); + of_property_read_u32(np, "keypad,num-columns", &kp->cols); + if (!kp->rows || !kp->cols) { + dev_err(dev, "number of keypad rows/columns not specified\n"); + return -EINVAL; + } + + if (of_property_read_bool(np, "linux,input-no-autorepeat")) + kp->no_autorepeat = true; + + return 0; +} +#else +static inline int smsc_keypad_parse_dt(struct device *dev, + struct smsc_keypad *kp) +{ + return -ENOSYS; +} +#endif + +static int __devinit +smsc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct smsc *smsc = dev_get_drvdata(pdev->dev.parent); + struct input_dev *input; + struct smsc_keypad *kp; + int ret = 0, error; + int col, i, max_keys, row_shift; + int irq; + int addr; + + kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL); + + input = input_allocate_device(); + if (!kp || !input) { + error = -ENOMEM; + goto err1; + } + + error = smsc_keypad_parse_dt(&pdev->dev, kp); + if (error) + return error; + + /* Get the debug Device */ + kp->input = input; + kp->smsc = smsc; + kp->irq = platform_get_irq(pdev, 0); + kp->dev = dev; + + for (col = 0; col < 16; col++) { + kp->last_key_state[col] = 0; + kp->last_key_ms[col] = 0; + } + + /* setup input device */ + __set_bit(EV_KEY, input->evbit); + + /* Enable auto repeat feature of Linux input subsystem */ + if (!(kp->no_autorepeat)) + __set_bit(EV_REP, input->evbit); + + input_set_capability(input, EV_MSC, MSC_SCAN); + input->name = "SMSC Keypad"; + input->phys = "smsc_keypad/input0"; + input->dev.parent = &pdev->dev; + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0001; + input->id.version = 0x0003; + + error = input_register_device(input); + if (error) { + dev_err(kp->dev, + "Unable to register twl4030 keypad device\n"); + goto err1; + } + + /* Mask all GPIO interrupts (0x37-0x3B) */ + for (addr = SMSC_GPIO_INT_MASK_START; + addr < SMSC_GPIO_INT_MASK_START + 4; addr++) + smsc_write(dev, addr, 0); + + /* Set all outputs high (0x05-0x09) */ + for (addr = SMSC_GPIO_DATA_OUT_START; + addr < SMSC_GPIO_DATA_OUT_START + 4; addr++) + smsc_write(dev, addr, 0xff); + + /* Clear all GPIO interrupts (0x32-0x36) */ + for (addr = SMSC_GPIO_INT_STAT_START; + addr < SMSC_GPIO_INT_STAT_START + 4; addr++) + smsc_write(dev, addr, 0xff); + + /* Configure the smsc pins as Keyboard scan Input */ + for (i = 0; i <= kp->rows; i++) { + addr = 0x12 + i; + smsc_write(dev, addr, SMSC_KP_KSI); + } + + /* Configure the smsc pins as Keyboard scan output */ + for (i = 0; i <= kp->cols; i++) { + addr = 0x1A + i; + smsc_write(dev, addr, SMSC_KP_KSO); + } + + smsc_write(dev, SMSC_KP_INT_STAT, SMSC_KP_SET_HIGH); + smsc_write(dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR); + smsc_write(dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW); + + row_shift = get_count_order(kp->cols); + max_keys = kp->rows << row_shift; + + kp->row_shift = row_shift; + kp->keymap = devm_kzalloc(dev, max_keys * sizeof(kp->keymap[0]), + GFP_KERNEL); + if (!kp->keymap) { + dev_err(&pdev->dev, "Not enough memory for keymap\n"); + error = -ENOMEM; + } + + matrix_keypad_build_keymap(NULL, NULL, kp->rows, + kp->cols, kp->keymap, input); + + /* + * This ISR will always execute in kernel thread context because of + * the need to access the SMSC over the I2C bus. + */ + ret = devm_request_threaded_irq(dev, kp->irq, NULL, do_kp_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, pdev->name, kp); + if (ret) { + dev_dbg(&pdev->dev, "request_irq failed for irq no=%d\n", + irq); + goto err2; + } + + /* Enable smsc keypad interrupts */ + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff); + if (ret < 0) + goto err2; + + return 0; + +err2: + input_unregister_device(input); +err1: + input_free_device(input); + return ret; +} + +static int __devexit smsc_remove(struct platform_device *pdev) +{ + struct smsc_keypad *kp = platform_get_drvdata(pdev); + input_unregister_device(kp->input); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id smsc_keypad_dt_match[] = { + { .compatible = "smsc,keypad" }, + {}, +}; +MODULE_DEVICE_TABLE(of, smsc_keypad_dt_match); +#endif + +static struct platform_driver smsc_driver = { + .driver = { + .name = "smsc-keypad", + .of_match_table = of_match_ptr(smsc_keypad_dt_match), + .owner = THIS_MODULE, + }, + .probe = smsc_probe, + .remove = __devexit_p(smsc_remove), +}; + +module_platform_driver(smsc_driver); + +MODULE_AUTHOR("G Kondaiah Manjunath <manjugk@ti.com>"); +MODULE_DESCRIPTION("SMSC ECE1099 Keypad driver"); +MODULE_LICENSE("GPL v2");