[PATCH 5/6] Driver for WM97xx touchscreens in streaming mode on Mainstone
Signed-off-by: Liam Girdwood <[EMAIL PROTECTED]> Signed-off-by: Graeme Gregory <[EMAIL PROTECTED]> Signed-off-by: Mike Arthur <[EMAIL PROTECTED]> Signed-off-by: Mark Brown <[EMAIL PROTECTED]> Cc: Dmitry Baryshkov <[EMAIL PROTECTED]> Cc: Stanley Cai <[EMAIL PROTECTED]> Cc: Rodolfo Giometti <[EMAIL PROTECTED]> Cc: Russell King <[EMAIL PROTECTED]> Cc: Marc Kleine-Budde <[EMAIL PROTECTED]> Cc: Pete MacKay <[EMAIL PROTECTED]> Cc: Ian Molton <[EMAIL PROTECTED]> Cc: Vince Sanders <[EMAIL PROTECTED]> Cc: Andrew Zabolotny <[EMAIL PROTECTED]> --- drivers/input/touchscreen/mainstone-wm97xx.c | 298 ++ 1 files changed, 298 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/mainstone-wm97xx.c diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c new file mode 100644 index 000..8e1c35d --- /dev/null +++ b/drivers/input/touchscreen/mainstone-wm97xx.c @@ -0,0 +1,298 @@ +/* + * mainstone-wm97xx.c -- Mainstone Continuous Touch screen driver for + * Wolfson WM97xx AC97 Codecs. + * + * Copyright 2004, 2007 Wolfson Microelectronics PLC. + * Author: Liam Girdwood + * [EMAIL PROTECTED] or [EMAIL PROTECTED] + * Parts Copyright : Ian Molton <[EMAIL PROTECTED]> + * Andrew Zabolotny <[EMAIL PROTECTED]> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * Notes: + * This is a wm97xx extended touch driver to capture touch + * data in a continuous manner on the Intel XScale archictecture + * + * Features: + * - codecs supported:- WM9705, WM9712, WM9713 + * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define VERSION"0.13" + +struct continuous { + u16 id;/* codec id */ + u8 code; /* continuous code */ + u8 reads; /* number of coord reads per read cycle */ + u32 speed; /* number of coords per second */ +}; + +#define WM_READS(sp) ((sp / HZ) + 1) + +static const struct continuous cinfo[] = { + {WM9705_ID2, 0, WM_READS(94), 94}, + {WM9705_ID2, 1, WM_READS(188), 188}, + {WM9705_ID2, 2, WM_READS(375), 375}, + {WM9705_ID2, 3, WM_READS(750), 750}, + {WM9712_ID2, 0, WM_READS(94), 94}, + {WM9712_ID2, 1, WM_READS(188), 188}, + {WM9712_ID2, 2, WM_READS(375), 375}, + {WM9712_ID2, 3, WM_READS(750), 750}, + {WM9713_ID2, 0, WM_READS(94), 94}, + {WM9713_ID2, 1, WM_READS(120), 120}, + {WM9713_ID2, 2, WM_READS(154), 154}, + {WM9713_ID2, 3, WM_READS(188), 188}, +}; + +/* continuous speed index */ +static int sp_idx; +static u16 last, tries; + +/* + * Pen sampling frequency (Hz) in continuous mode. + */ +static int cont_rate = 200; +module_param(cont_rate, int, 0); +MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)"); + +/* + * Pen down detection. + * + * This driver can either poll or use an interrupt to indicate a pen down + * event. If the irq request fails then it will fall back to polling mode. + */ +static int pen_int; +module_param(pen_int, int, 0); +MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)"); + +/* + * Pressure readback. + * + * Set to 1 to read back pen down pressure + */ +static int pressure; +module_param(pressure, int, 0); +MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)"); + +/* + * AC97 touch data slot. + * + * Touch screen readback data ac97 slot + */ +static int ac97_touch_slot = 5; +module_param(ac97_touch_slot, int, 0); +MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number"); + + +/* flush AC97 slot 5 FIFO on pxa machines */ +#ifdef CONFIG_PXA27x +static void wm97xx_acc_pen_up(struct wm97xx *wm) +{ + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + while (MISR & (1 << 2)) + MODR; +} +#else +static void wm97xx_acc_pen_up(struct wm97xx *wm) +{ + int count = 16; + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + while (count < 16) { + MODR; + count--; + } +} +#endif + +static int wm97xx_acc_pen_down(struct wm97xx *wm) +{ + u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES; + int reads = 0; + + /* data is never immediately available after pen down irq */ + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + if (tries > 5) { + tries = 0; + return RC_PENUP; + } + + x = MODR; + if (x == last) { + tries++; + return RC_AGAIN; + } + last = x;
[PATCH 5/6] Driver for WM97xx touchscreens in streaming mode on Mainstone
Signed-off-by: Liam Girdwood <[EMAIL PROTECTED]> Signed-off-by: Graeme Gregory <[EMAIL PROTECTED]> Signed-off-by: Mike Arthur <[EMAIL PROTECTED]> Signed-off-by: Mark Brown <[EMAIL PROTECTED]> Cc: Dmitry Baryshkov <[EMAIL PROTECTED]> Cc: Stanley Cai <[EMAIL PROTECTED]> Cc: Rodolfo Giometti <[EMAIL PROTECTED]> Cc: Russell King <[EMAIL PROTECTED]> Cc: Marc Kleine-Budde <[EMAIL PROTECTED]> Cc: Pete MacKay <[EMAIL PROTECTED]> Cc: Ian Molton <[EMAIL PROTECTED]> Cc: Vince Sanders <[EMAIL PROTECTED]> Cc: Andrew Zabolotny <[EMAIL PROTECTED]> --- drivers/input/touchscreen/mainstone-wm97xx.c | 298 ++ 1 files changed, 298 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/mainstone-wm97xx.c diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c new file mode 100644 index 000..8e1c35d --- /dev/null +++ b/drivers/input/touchscreen/mainstone-wm97xx.c @@ -0,0 +1,298 @@ +/* + * mainstone-wm97xx.c -- Mainstone Continuous Touch screen driver for + * Wolfson WM97xx AC97 Codecs. + * + * Copyright 2004, 2007 Wolfson Microelectronics PLC. + * Author: Liam Girdwood + * [EMAIL PROTECTED] or [EMAIL PROTECTED] + * Parts Copyright : Ian Molton <[EMAIL PROTECTED]> + * Andrew Zabolotny <[EMAIL PROTECTED]> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * Notes: + * This is a wm97xx extended touch driver to capture touch + * data in a continuous manner on the Intel XScale archictecture + * + * Features: + * - codecs supported:- WM9705, WM9712, WM9713 + * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define VERSION"0.13" + +struct continuous { + u16 id;/* codec id */ + u8 code; /* continuous code */ + u8 reads; /* number of coord reads per read cycle */ + u32 speed; /* number of coords per second */ +}; + +#define WM_READS(sp) ((sp / HZ) + 1) + +static const struct continuous cinfo[] = { + {WM9705_ID2, 0, WM_READS(94), 94}, + {WM9705_ID2, 1, WM_READS(188), 188}, + {WM9705_ID2, 2, WM_READS(375), 375}, + {WM9705_ID2, 3, WM_READS(750), 750}, + {WM9712_ID2, 0, WM_READS(94), 94}, + {WM9712_ID2, 1, WM_READS(188), 188}, + {WM9712_ID2, 2, WM_READS(375), 375}, + {WM9712_ID2, 3, WM_READS(750), 750}, + {WM9713_ID2, 0, WM_READS(94), 94}, + {WM9713_ID2, 1, WM_READS(120), 120}, + {WM9713_ID2, 2, WM_READS(154), 154}, + {WM9713_ID2, 3, WM_READS(188), 188}, +}; + +/* continuous speed index */ +static int sp_idx; +static u16 last, tries; + +/* + * Pen sampling frequency (Hz) in continuous mode. + */ +static int cont_rate = 200; +module_param(cont_rate, int, 0); +MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)"); + +/* + * Pen down detection. + * + * This driver can either poll or use an interrupt to indicate a pen down + * event. If the irq request fails then it will fall back to polling mode. + */ +static int pen_int; +module_param(pen_int, int, 0); +MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)"); + +/* + * Pressure readback. + * + * Set to 1 to read back pen down pressure + */ +static int pressure; +module_param(pressure, int, 0); +MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)"); + +/* + * AC97 touch data slot. + * + * Touch screen readback data ac97 slot + */ +static int ac97_touch_slot = 5; +module_param(ac97_touch_slot, int, 0); +MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number"); + + +/* flush AC97 slot 5 FIFO on pxa machines */ +#ifdef CONFIG_PXA27x +static void wm97xx_acc_pen_up(struct wm97xx *wm) +{ + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + while (MISR & (1 << 2)) + MODR; +} +#else +static void wm97xx_acc_pen_up(struct wm97xx *wm) +{ + int count = 16; + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + while (count < 16) { + MODR; + count--; + } +} +#endif + +static int wm97xx_acc_pen_down(struct wm97xx *wm) +{ + u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES; + int reads = 0; + + /* data is never immediately available after pen down irq */ + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(1); + + if (tries > 5) { + tries = 0; + return RC_PENUP; + } + + x = MODR; + if (x == last) { + tries++; + return RC_AGAIN; + } + last = x;