Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the ADC present in the Atmel AT91 evaluation boards. |
| 3 | * |
| 4 | * Copyright 2011 Free Electrons |
| 5 | * |
| 6 | * Licensed under the GPLv2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/bitmap.h> |
| 10 | #include <linux/bitops.h> |
| 11 | #include <linux/clk.h> |
| 12 | #include <linux/err.h> |
| 13 | #include <linux/io.h> |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 14 | #include <linux/input.h> |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/jiffies.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 19 | #include <linux/of.h> |
| 20 | #include <linux/of_device.h> |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/wait.h> |
| 25 | |
| 26 | #include <linux/platform_data/at91_adc.h> |
| 27 | |
| 28 | #include <linux/iio/iio.h> |
| 29 | #include <linux/iio/buffer.h> |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 30 | #include <linux/iio/trigger.h> |
| 31 | #include <linux/iio/trigger_consumer.h> |
Lars-Peter Clausen | 90032e4 | 2012-06-18 18:33:49 +0200 | [diff] [blame] | 32 | #include <linux/iio/triggered_buffer.h> |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 33 | |
Alexandre Belloni | bee20c4 | 2014-04-15 12:28:01 +0200 | [diff] [blame] | 34 | /* Registers */ |
| 35 | #define AT91_ADC_CR 0x00 /* Control Register */ |
| 36 | #define AT91_ADC_SWRST (1 << 0) /* Software Reset */ |
| 37 | #define AT91_ADC_START (1 << 1) /* Start Conversion */ |
| 38 | |
| 39 | #define AT91_ADC_MR 0x04 /* Mode Register */ |
| 40 | #define AT91_ADC_TSAMOD (3 << 0) /* ADC mode */ |
| 41 | #define AT91_ADC_TSAMOD_ADC_ONLY_MODE (0 << 0) /* ADC Mode */ |
| 42 | #define AT91_ADC_TSAMOD_TS_ONLY_MODE (1 << 0) /* Touch Screen Only Mode */ |
| 43 | #define AT91_ADC_TRGEN (1 << 0) /* Trigger Enable */ |
| 44 | #define AT91_ADC_TRGSEL (7 << 1) /* Trigger Selection */ |
| 45 | #define AT91_ADC_TRGSEL_TC0 (0 << 1) |
| 46 | #define AT91_ADC_TRGSEL_TC1 (1 << 1) |
| 47 | #define AT91_ADC_TRGSEL_TC2 (2 << 1) |
| 48 | #define AT91_ADC_TRGSEL_EXTERNAL (6 << 1) |
| 49 | #define AT91_ADC_LOWRES (1 << 4) /* Low Resolution */ |
| 50 | #define AT91_ADC_SLEEP (1 << 5) /* Sleep Mode */ |
| 51 | #define AT91_ADC_PENDET (1 << 6) /* Pen contact detection enable */ |
| 52 | #define AT91_ADC_PRESCAL_9260 (0x3f << 8) /* Prescalar Rate Selection */ |
| 53 | #define AT91_ADC_PRESCAL_9G45 (0xff << 8) |
| 54 | #define AT91_ADC_PRESCAL_(x) ((x) << 8) |
| 55 | #define AT91_ADC_STARTUP_9260 (0x1f << 16) /* Startup Up Time */ |
| 56 | #define AT91_ADC_STARTUP_9G45 (0x7f << 16) |
| 57 | #define AT91_ADC_STARTUP_9X5 (0xf << 16) |
| 58 | #define AT91_ADC_STARTUP_(x) ((x) << 16) |
| 59 | #define AT91_ADC_SHTIM (0xf << 24) /* Sample & Hold Time */ |
| 60 | #define AT91_ADC_SHTIM_(x) ((x) << 24) |
| 61 | #define AT91_ADC_PENDBC (0x0f << 28) /* Pen Debounce time */ |
| 62 | #define AT91_ADC_PENDBC_(x) ((x) << 28) |
| 63 | |
| 64 | #define AT91_ADC_TSR 0x0C |
| 65 | #define AT91_ADC_TSR_SHTIM (0xf << 24) /* Sample & Hold Time */ |
| 66 | #define AT91_ADC_TSR_SHTIM_(x) ((x) << 24) |
| 67 | |
| 68 | #define AT91_ADC_CHER 0x10 /* Channel Enable Register */ |
| 69 | #define AT91_ADC_CHDR 0x14 /* Channel Disable Register */ |
| 70 | #define AT91_ADC_CHSR 0x18 /* Channel Status Register */ |
| 71 | #define AT91_ADC_CH(n) (1 << (n)) /* Channel Number */ |
| 72 | |
| 73 | #define AT91_ADC_SR 0x1C /* Status Register */ |
| 74 | #define AT91_ADC_EOC(n) (1 << (n)) /* End of Conversion on Channel N */ |
| 75 | #define AT91_ADC_OVRE(n) (1 << ((n) + 8))/* Overrun Error on Channel N */ |
| 76 | #define AT91_ADC_DRDY (1 << 16) /* Data Ready */ |
| 77 | #define AT91_ADC_GOVRE (1 << 17) /* General Overrun Error */ |
| 78 | #define AT91_ADC_ENDRX (1 << 18) /* End of RX Buffer */ |
| 79 | #define AT91_ADC_RXFUFF (1 << 19) /* RX Buffer Full */ |
| 80 | |
| 81 | #define AT91_ADC_SR_9X5 0x30 /* Status Register for 9x5 */ |
| 82 | #define AT91_ADC_SR_DRDY_9X5 (1 << 24) /* Data Ready */ |
| 83 | |
| 84 | #define AT91_ADC_LCDR 0x20 /* Last Converted Data Register */ |
| 85 | #define AT91_ADC_LDATA (0x3ff) |
| 86 | |
| 87 | #define AT91_ADC_IER 0x24 /* Interrupt Enable Register */ |
| 88 | #define AT91_ADC_IDR 0x28 /* Interrupt Disable Register */ |
| 89 | #define AT91_ADC_IMR 0x2C /* Interrupt Mask Register */ |
| 90 | #define AT91RL_ADC_IER_PEN (1 << 20) |
| 91 | #define AT91RL_ADC_IER_NOPEN (1 << 21) |
| 92 | #define AT91_ADC_IER_PEN (1 << 29) |
| 93 | #define AT91_ADC_IER_NOPEN (1 << 30) |
| 94 | #define AT91_ADC_IER_XRDY (1 << 20) |
| 95 | #define AT91_ADC_IER_YRDY (1 << 21) |
| 96 | #define AT91_ADC_IER_PRDY (1 << 22) |
| 97 | #define AT91_ADC_ISR_PENS (1 << 31) |
| 98 | |
| 99 | #define AT91_ADC_CHR(n) (0x30 + ((n) * 4)) /* Channel Data Register N */ |
| 100 | #define AT91_ADC_DATA (0x3ff) |
| 101 | |
| 102 | #define AT91_ADC_CDR0_9X5 (0x50) /* Channel Data Register 0 for 9X5 */ |
| 103 | |
| 104 | #define AT91_ADC_ACR 0x94 /* Analog Control Register */ |
| 105 | #define AT91_ADC_ACR_PENDETSENS (0x3 << 0) /* pull-up resistor */ |
| 106 | |
| 107 | #define AT91_ADC_TSMR 0xB0 |
| 108 | #define AT91_ADC_TSMR_TSMODE (3 << 0) /* Touch Screen Mode */ |
| 109 | #define AT91_ADC_TSMR_TSMODE_NONE (0 << 0) |
| 110 | #define AT91_ADC_TSMR_TSMODE_4WIRE_NO_PRESS (1 << 0) |
| 111 | #define AT91_ADC_TSMR_TSMODE_4WIRE_PRESS (2 << 0) |
| 112 | #define AT91_ADC_TSMR_TSMODE_5WIRE (3 << 0) |
| 113 | #define AT91_ADC_TSMR_TSAV (3 << 4) /* Averages samples */ |
| 114 | #define AT91_ADC_TSMR_TSAV_(x) ((x) << 4) |
| 115 | #define AT91_ADC_TSMR_SCTIM (0x0f << 16) /* Switch closure time */ |
| 116 | #define AT91_ADC_TSMR_PENDBC (0x0f << 28) /* Pen Debounce time */ |
| 117 | #define AT91_ADC_TSMR_PENDBC_(x) ((x) << 28) |
| 118 | #define AT91_ADC_TSMR_NOTSDMA (1 << 22) /* No Touchscreen DMA */ |
| 119 | #define AT91_ADC_TSMR_PENDET_DIS (0 << 24) /* Pen contact detection disable */ |
| 120 | #define AT91_ADC_TSMR_PENDET_ENA (1 << 24) /* Pen contact detection enable */ |
| 121 | |
| 122 | #define AT91_ADC_TSXPOSR 0xB4 |
| 123 | #define AT91_ADC_TSYPOSR 0xB8 |
| 124 | #define AT91_ADC_TSPRESSR 0xBC |
| 125 | |
| 126 | #define AT91_ADC_TRGR_9260 AT91_ADC_MR |
| 127 | #define AT91_ADC_TRGR_9G45 0x08 |
| 128 | #define AT91_ADC_TRGR_9X5 0xC0 |
| 129 | |
| 130 | /* Trigger Register bit field */ |
| 131 | #define AT91_ADC_TRGR_TRGPER (0xffff << 16) |
| 132 | #define AT91_ADC_TRGR_TRGPER_(x) ((x) << 16) |
| 133 | #define AT91_ADC_TRGR_TRGMOD (0x7 << 0) |
| 134 | #define AT91_ADC_TRGR_NONE (0 << 0) |
| 135 | #define AT91_ADC_TRGR_MOD_PERIOD_TRIG (5 << 0) |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 136 | |
| 137 | #define AT91_ADC_CHAN(st, ch) \ |
| 138 | (st->registers->channel_base + (ch * 4)) |
| 139 | #define at91_adc_readl(st, reg) \ |
| 140 | (readl_relaxed(st->reg_base + reg)) |
| 141 | #define at91_adc_writel(st, reg, val) \ |
| 142 | (writel_relaxed(val, st->reg_base + reg)) |
| 143 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 144 | #define DRIVER_NAME "at91_adc" |
| 145 | #define MAX_POS_BITS 12 |
| 146 | |
| 147 | #define TOUCH_SAMPLE_PERIOD_US 2000 /* 2ms */ |
| 148 | #define TOUCH_PEN_DETECT_DEBOUNCE_US 200 |
| 149 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 150 | #define MAX_RLPOS_BITS 10 |
| 151 | #define TOUCH_SAMPLE_PERIOD_US_RL 10000 /* 10ms, the SoC can't keep up with 2ms */ |
| 152 | #define TOUCH_SHTIM 0xa |
| 153 | |
Alexandre Belloni | 2de0c01 | 2014-04-15 12:27:58 +0200 | [diff] [blame] | 154 | /** |
| 155 | * struct at91_adc_reg_desc - Various informations relative to registers |
| 156 | * @channel_base: Base offset for the channel data registers |
| 157 | * @drdy_mask: Mask of the DRDY field in the relevant registers |
| 158 | (Interruptions registers mostly) |
| 159 | * @status_register: Offset of the Interrupt Status Register |
| 160 | * @trigger_register: Offset of the Trigger setup register |
| 161 | * @mr_prescal_mask: Mask of the PRESCAL field in the adc MR register |
| 162 | * @mr_startup_mask: Mask of the STARTUP field in the adc MR register |
| 163 | */ |
| 164 | struct at91_adc_reg_desc { |
| 165 | u8 channel_base; |
| 166 | u32 drdy_mask; |
| 167 | u8 status_register; |
| 168 | u8 trigger_register; |
| 169 | u32 mr_prescal_mask; |
| 170 | u32 mr_startup_mask; |
| 171 | }; |
| 172 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 173 | struct at91_adc_caps { |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 174 | bool has_ts; /* Support touch screen */ |
| 175 | bool has_tsmr; /* only at91sam9x5, sama5d3 have TSMR reg */ |
| 176 | /* |
| 177 | * Numbers of sampling data will be averaged. Can be 0~3. |
| 178 | * Hardware can average (2 ^ ts_filter_average) sample data. |
| 179 | */ |
| 180 | u8 ts_filter_average; |
| 181 | /* Pen Detection input pull-up resistor, can be 0~3 */ |
| 182 | u8 ts_pen_detect_sensitivity; |
| 183 | |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 184 | /* startup time calculate function */ |
Jan Leupold | 2ab5f39 | 2015-06-17 18:21:36 +0200 | [diff] [blame^] | 185 | u32 (*calc_startup_ticks)(u32 startup_time, u32 adc_clk_khz); |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 186 | |
Josh Wu | 2b6d598 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 187 | u8 num_channels; |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 188 | struct at91_adc_reg_desc registers; |
| 189 | }; |
| 190 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 191 | struct at91_adc_state { |
| 192 | struct clk *adc_clk; |
| 193 | u16 *buffer; |
| 194 | unsigned long channels_mask; |
| 195 | struct clk *clk; |
| 196 | bool done; |
| 197 | int irq; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 198 | u16 last_value; |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 199 | int chnb; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 200 | struct mutex lock; |
| 201 | u8 num_channels; |
| 202 | void __iomem *reg_base; |
| 203 | struct at91_adc_reg_desc *registers; |
Jan Leupold | 2ab5f39 | 2015-06-17 18:21:36 +0200 | [diff] [blame^] | 204 | u32 startup_time; |
Jean-Christophe PLAGNIOL-VILLARD | beca9e7 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 205 | u8 sample_hold_time; |
Jean-Christophe PLAGNIOL-VILLARD | e748783 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 206 | bool sleep_mode; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 207 | struct iio_trigger **trig; |
| 208 | struct at91_adc_trigger *trigger_list; |
| 209 | u32 trigger_number; |
| 210 | bool use_external; |
| 211 | u32 vref_mv; |
Ludovic Desroches | 47be16b | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 212 | u32 res; /* resolution used for convertions */ |
| 213 | bool low_res; /* the resolution corresponds to the lowest one */ |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 214 | wait_queue_head_t wq_data_avail; |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 215 | struct at91_adc_caps *caps; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 216 | |
| 217 | /* |
| 218 | * Following ADC channels are shared by touchscreen: |
| 219 | * |
| 220 | * CH0 -- Touch screen XP/UL |
| 221 | * CH1 -- Touch screen XM/UR |
| 222 | * CH2 -- Touch screen YP/LL |
| 223 | * CH3 -- Touch screen YM/Sense |
| 224 | * CH4 -- Touch screen LR(5-wire only) |
| 225 | * |
| 226 | * The bitfields below represents the reserved channel in the |
| 227 | * touchscreen mode. |
| 228 | */ |
| 229 | #define CHAN_MASK_TOUCHSCREEN_4WIRE (0xf << 0) |
| 230 | #define CHAN_MASK_TOUCHSCREEN_5WIRE (0x1f << 0) |
| 231 | enum atmel_adc_ts_type touchscreen_type; |
| 232 | struct input_dev *ts_input; |
| 233 | |
| 234 | u16 ts_sample_period_val; |
| 235 | u32 ts_pressure_threshold; |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 236 | u16 ts_pendbc; |
| 237 | |
| 238 | bool ts_bufferedmeasure; |
| 239 | u32 ts_prev_absx; |
| 240 | u32 ts_prev_absy; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 241 | }; |
| 242 | |
| 243 | static irqreturn_t at91_adc_trigger_handler(int irq, void *p) |
| 244 | { |
| 245 | struct iio_poll_func *pf = p; |
| 246 | struct iio_dev *idev = pf->indio_dev; |
| 247 | struct at91_adc_state *st = iio_priv(idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 248 | int i, j = 0; |
| 249 | |
| 250 | for (i = 0; i < idev->masklength; i++) { |
| 251 | if (!test_bit(i, idev->active_scan_mask)) |
| 252 | continue; |
| 253 | st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, i)); |
| 254 | j++; |
| 255 | } |
| 256 | |
Lars-Peter Clausen | e79cece | 2013-09-19 13:59:00 +0100 | [diff] [blame] | 257 | iio_push_to_buffers_with_timestamp(idev, st->buffer, pf->timestamp); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 258 | |
| 259 | iio_trigger_notify_done(idev->trig); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 260 | |
| 261 | /* Needed to ACK the DRDY interruption */ |
| 262 | at91_adc_readl(st, AT91_ADC_LCDR); |
| 263 | |
| 264 | enable_irq(st->irq); |
| 265 | |
| 266 | return IRQ_HANDLED; |
| 267 | } |
| 268 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 269 | /* Handler for classic adc channel eoc trigger */ |
Josh Wu | 3068ab2 | 2014-08-27 09:31:00 +0100 | [diff] [blame] | 270 | static void handle_adc_eoc_trigger(int irq, struct iio_dev *idev) |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 271 | { |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 272 | struct at91_adc_state *st = iio_priv(idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 273 | |
| 274 | if (iio_buffer_enabled(idev)) { |
| 275 | disable_irq_nosync(irq); |
Peter Meerwald | 398fd22 | 2014-12-06 06:46:00 +0000 | [diff] [blame] | 276 | iio_trigger_poll(idev->trig); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 277 | } else { |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 278 | st->last_value = at91_adc_readl(st, AT91_ADC_CHAN(st, st->chnb)); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 279 | st->done = true; |
| 280 | wake_up_interruptible(&st->wq_data_avail); |
| 281 | } |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | static int at91_ts_sample(struct at91_adc_state *st) |
| 285 | { |
| 286 | unsigned int xscale, yscale, reg, z1, z2; |
| 287 | unsigned int x, y, pres, xpos, ypos; |
| 288 | unsigned int rxp = 1; |
| 289 | unsigned int factor = 1000; |
| 290 | struct iio_dev *idev = iio_priv_to_dev(st); |
| 291 | |
| 292 | unsigned int xyz_mask_bits = st->res; |
| 293 | unsigned int xyz_mask = (1 << xyz_mask_bits) - 1; |
| 294 | |
| 295 | /* calculate position */ |
| 296 | /* x position = (x / xscale) * max, max = 2^MAX_POS_BITS - 1 */ |
| 297 | reg = at91_adc_readl(st, AT91_ADC_TSXPOSR); |
| 298 | xpos = reg & xyz_mask; |
| 299 | x = (xpos << MAX_POS_BITS) - xpos; |
| 300 | xscale = (reg >> 16) & xyz_mask; |
| 301 | if (xscale == 0) { |
| 302 | dev_err(&idev->dev, "Error: xscale == 0!\n"); |
| 303 | return -1; |
| 304 | } |
| 305 | x /= xscale; |
| 306 | |
| 307 | /* y position = (y / yscale) * max, max = 2^MAX_POS_BITS - 1 */ |
| 308 | reg = at91_adc_readl(st, AT91_ADC_TSYPOSR); |
| 309 | ypos = reg & xyz_mask; |
| 310 | y = (ypos << MAX_POS_BITS) - ypos; |
| 311 | yscale = (reg >> 16) & xyz_mask; |
| 312 | if (yscale == 0) { |
| 313 | dev_err(&idev->dev, "Error: yscale == 0!\n"); |
| 314 | return -1; |
| 315 | } |
| 316 | y /= yscale; |
| 317 | |
| 318 | /* calculate the pressure */ |
| 319 | reg = at91_adc_readl(st, AT91_ADC_TSPRESSR); |
| 320 | z1 = reg & xyz_mask; |
| 321 | z2 = (reg >> 16) & xyz_mask; |
| 322 | |
| 323 | if (z1 != 0) |
| 324 | pres = rxp * (x * factor / 1024) * (z2 * factor / z1 - factor) |
| 325 | / factor; |
| 326 | else |
| 327 | pres = st->ts_pressure_threshold; /* no pen contacted */ |
| 328 | |
| 329 | dev_dbg(&idev->dev, "xpos = %d, xscale = %d, ypos = %d, yscale = %d, z1 = %d, z2 = %d, press = %d\n", |
| 330 | xpos, xscale, ypos, yscale, z1, z2, pres); |
| 331 | |
| 332 | if (pres < st->ts_pressure_threshold) { |
| 333 | dev_dbg(&idev->dev, "x = %d, y = %d, pressure = %d\n", |
| 334 | x, y, pres / factor); |
| 335 | input_report_abs(st->ts_input, ABS_X, x); |
| 336 | input_report_abs(st->ts_input, ABS_Y, y); |
| 337 | input_report_abs(st->ts_input, ABS_PRESSURE, pres); |
| 338 | input_report_key(st->ts_input, BTN_TOUCH, 1); |
| 339 | input_sync(st->ts_input); |
| 340 | } else { |
| 341 | dev_dbg(&idev->dev, "pressure too low: not reporting\n"); |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 347 | static irqreturn_t at91_adc_rl_interrupt(int irq, void *private) |
| 348 | { |
| 349 | struct iio_dev *idev = private; |
| 350 | struct at91_adc_state *st = iio_priv(idev); |
| 351 | u32 status = at91_adc_readl(st, st->registers->status_register); |
| 352 | unsigned int reg; |
| 353 | |
| 354 | status &= at91_adc_readl(st, AT91_ADC_IMR); |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 355 | if (status & GENMASK(st->num_channels - 1, 0)) |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 356 | handle_adc_eoc_trigger(irq, idev); |
| 357 | |
| 358 | if (status & AT91RL_ADC_IER_PEN) { |
| 359 | /* Disabling pen debounce is required to get a NOPEN irq */ |
| 360 | reg = at91_adc_readl(st, AT91_ADC_MR); |
| 361 | reg &= ~AT91_ADC_PENDBC; |
| 362 | at91_adc_writel(st, AT91_ADC_MR, reg); |
| 363 | |
| 364 | at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN); |
| 365 | at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_NOPEN |
| 366 | | AT91_ADC_EOC(3)); |
| 367 | /* Set up period trigger for sampling */ |
| 368 | at91_adc_writel(st, st->registers->trigger_register, |
| 369 | AT91_ADC_TRGR_MOD_PERIOD_TRIG | |
| 370 | AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val)); |
| 371 | } else if (status & AT91RL_ADC_IER_NOPEN) { |
| 372 | reg = at91_adc_readl(st, AT91_ADC_MR); |
| 373 | reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC; |
| 374 | at91_adc_writel(st, AT91_ADC_MR, reg); |
| 375 | at91_adc_writel(st, st->registers->trigger_register, |
| 376 | AT91_ADC_TRGR_NONE); |
| 377 | |
| 378 | at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_NOPEN |
| 379 | | AT91_ADC_EOC(3)); |
| 380 | at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN); |
| 381 | st->ts_bufferedmeasure = false; |
| 382 | input_report_key(st->ts_input, BTN_TOUCH, 0); |
| 383 | input_sync(st->ts_input); |
| 384 | } else if (status & AT91_ADC_EOC(3)) { |
| 385 | /* Conversion finished */ |
| 386 | if (st->ts_bufferedmeasure) { |
| 387 | /* |
| 388 | * Last measurement is always discarded, since it can |
| 389 | * be erroneous. |
| 390 | * Always report previous measurement |
| 391 | */ |
| 392 | input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx); |
| 393 | input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy); |
| 394 | input_report_key(st->ts_input, BTN_TOUCH, 1); |
| 395 | input_sync(st->ts_input); |
| 396 | } else |
| 397 | st->ts_bufferedmeasure = true; |
| 398 | |
| 399 | /* Now make new measurement */ |
| 400 | st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3)) |
| 401 | << MAX_RLPOS_BITS; |
| 402 | st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2)); |
| 403 | |
| 404 | st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1)) |
| 405 | << MAX_RLPOS_BITS; |
| 406 | st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0)); |
| 407 | } |
| 408 | |
| 409 | return IRQ_HANDLED; |
| 410 | } |
| 411 | |
| 412 | static irqreturn_t at91_adc_9x5_interrupt(int irq, void *private) |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 413 | { |
| 414 | struct iio_dev *idev = private; |
| 415 | struct at91_adc_state *st = iio_priv(idev); |
| 416 | u32 status = at91_adc_readl(st, st->registers->status_register); |
| 417 | const uint32_t ts_data_irq_mask = |
| 418 | AT91_ADC_IER_XRDY | |
| 419 | AT91_ADC_IER_YRDY | |
| 420 | AT91_ADC_IER_PRDY; |
| 421 | |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 422 | if (status & GENMASK(st->num_channels - 1, 0)) |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 423 | handle_adc_eoc_trigger(irq, idev); |
| 424 | |
| 425 | if (status & AT91_ADC_IER_PEN) { |
| 426 | at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN); |
| 427 | at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_NOPEN | |
| 428 | ts_data_irq_mask); |
| 429 | /* Set up period trigger for sampling */ |
| 430 | at91_adc_writel(st, st->registers->trigger_register, |
| 431 | AT91_ADC_TRGR_MOD_PERIOD_TRIG | |
| 432 | AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val)); |
| 433 | } else if (status & AT91_ADC_IER_NOPEN) { |
| 434 | at91_adc_writel(st, st->registers->trigger_register, 0); |
| 435 | at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_NOPEN | |
| 436 | ts_data_irq_mask); |
| 437 | at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN); |
| 438 | |
| 439 | input_report_key(st->ts_input, BTN_TOUCH, 0); |
| 440 | input_sync(st->ts_input); |
| 441 | } else if ((status & ts_data_irq_mask) == ts_data_irq_mask) { |
| 442 | /* Now all touchscreen data is ready */ |
| 443 | |
| 444 | if (status & AT91_ADC_ISR_PENS) { |
| 445 | /* validate data by pen contact */ |
| 446 | at91_ts_sample(st); |
| 447 | } else { |
| 448 | /* triggered by event that is no pen contact, just read |
| 449 | * them to clean the interrupt and discard all. |
| 450 | */ |
| 451 | at91_adc_readl(st, AT91_ADC_TSXPOSR); |
| 452 | at91_adc_readl(st, AT91_ADC_TSYPOSR); |
| 453 | at91_adc_readl(st, AT91_ADC_TSPRESSR); |
| 454 | } |
| 455 | } |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 456 | |
| 457 | return IRQ_HANDLED; |
| 458 | } |
| 459 | |
| 460 | static int at91_adc_channel_init(struct iio_dev *idev) |
| 461 | { |
| 462 | struct at91_adc_state *st = iio_priv(idev); |
| 463 | struct iio_chan_spec *chan_array, *timestamp; |
| 464 | int bit, idx = 0; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 465 | unsigned long rsvd_mask = 0; |
| 466 | |
| 467 | /* If touchscreen is enable, then reserve the adc channels */ |
| 468 | if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE) |
| 469 | rsvd_mask = CHAN_MASK_TOUCHSCREEN_4WIRE; |
| 470 | else if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_5WIRE) |
| 471 | rsvd_mask = CHAN_MASK_TOUCHSCREEN_5WIRE; |
| 472 | |
| 473 | /* set up the channel mask to reserve touchscreen channels */ |
| 474 | st->channels_mask &= ~rsvd_mask; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 475 | |
| 476 | idev->num_channels = bitmap_weight(&st->channels_mask, |
| 477 | st->num_channels) + 1; |
| 478 | |
Axel Lin | 6b3aa31 | 2012-10-29 08:25:00 +0000 | [diff] [blame] | 479 | chan_array = devm_kzalloc(&idev->dev, |
| 480 | ((idev->num_channels + 1) * |
| 481 | sizeof(struct iio_chan_spec)), |
| 482 | GFP_KERNEL); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 483 | |
| 484 | if (!chan_array) |
| 485 | return -ENOMEM; |
| 486 | |
| 487 | for_each_set_bit(bit, &st->channels_mask, st->num_channels) { |
| 488 | struct iio_chan_spec *chan = chan_array + idx; |
| 489 | |
| 490 | chan->type = IIO_VOLTAGE; |
| 491 | chan->indexed = 1; |
| 492 | chan->channel = bit; |
| 493 | chan->scan_index = idx; |
| 494 | chan->scan_type.sign = 'u'; |
Ludovic Desroches | 47be16b | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 495 | chan->scan_type.realbits = st->res; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 496 | chan->scan_type.storagebits = 16; |
Jonathan Cameron | 01bdab6 | 2013-02-27 19:06:10 +0000 | [diff] [blame] | 497 | chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); |
| 498 | chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 499 | idx++; |
| 500 | } |
| 501 | timestamp = chan_array + idx; |
| 502 | |
| 503 | timestamp->type = IIO_TIMESTAMP; |
| 504 | timestamp->channel = -1; |
| 505 | timestamp->scan_index = idx; |
| 506 | timestamp->scan_type.sign = 's'; |
| 507 | timestamp->scan_type.realbits = 64; |
| 508 | timestamp->scan_type.storagebits = 64; |
| 509 | |
| 510 | idev->channels = chan_array; |
| 511 | return idev->num_channels; |
| 512 | } |
| 513 | |
Dan Carpenter | 4f3bcd8 | 2014-11-06 09:13:00 +0000 | [diff] [blame] | 514 | static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev, |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 515 | struct at91_adc_trigger *triggers, |
| 516 | const char *trigger_name) |
| 517 | { |
| 518 | struct at91_adc_state *st = iio_priv(idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 519 | int i; |
| 520 | |
| 521 | for (i = 0; i < st->trigger_number; i++) { |
| 522 | char *name = kasprintf(GFP_KERNEL, |
| 523 | "%s-dev%d-%s", |
| 524 | idev->name, |
| 525 | idev->id, |
| 526 | triggers[i].name); |
| 527 | if (!name) |
| 528 | return -ENOMEM; |
| 529 | |
| 530 | if (strcmp(trigger_name, name) == 0) { |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 531 | kfree(name); |
Dan Carpenter | 4f3bcd8 | 2014-11-06 09:13:00 +0000 | [diff] [blame] | 532 | if (triggers[i].value == 0) |
| 533 | return -EINVAL; |
| 534 | return triggers[i].value; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | kfree(name); |
| 538 | } |
| 539 | |
Dan Carpenter | 4f3bcd8 | 2014-11-06 09:13:00 +0000 | [diff] [blame] | 540 | return -EINVAL; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state) |
| 544 | { |
Lars-Peter Clausen | 1e9663c | 2013-03-25 08:58:00 +0000 | [diff] [blame] | 545 | struct iio_dev *idev = iio_trigger_get_drvdata(trig); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 546 | struct at91_adc_state *st = iio_priv(idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 547 | struct at91_adc_reg_desc *reg = st->registers; |
| 548 | u32 status = at91_adc_readl(st, reg->trigger_register); |
Dan Carpenter | 4f3bcd8 | 2014-11-06 09:13:00 +0000 | [diff] [blame] | 549 | int value; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 550 | u8 bit; |
| 551 | |
| 552 | value = at91_adc_get_trigger_value_by_name(idev, |
| 553 | st->trigger_list, |
| 554 | idev->trig->name); |
Dan Carpenter | 4f3bcd8 | 2014-11-06 09:13:00 +0000 | [diff] [blame] | 555 | if (value < 0) |
| 556 | return value; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 557 | |
| 558 | if (state) { |
| 559 | st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL); |
| 560 | if (st->buffer == NULL) |
| 561 | return -ENOMEM; |
| 562 | |
| 563 | at91_adc_writel(st, reg->trigger_register, |
| 564 | status | value); |
| 565 | |
Octavian Purdila | 70dddee | 2015-03-02 21:03:05 +0200 | [diff] [blame] | 566 | for_each_set_bit(bit, idev->active_scan_mask, |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 567 | st->num_channels) { |
| 568 | struct iio_chan_spec const *chan = idev->channels + bit; |
| 569 | at91_adc_writel(st, AT91_ADC_CHER, |
| 570 | AT91_ADC_CH(chan->channel)); |
| 571 | } |
| 572 | |
| 573 | at91_adc_writel(st, AT91_ADC_IER, reg->drdy_mask); |
| 574 | |
| 575 | } else { |
| 576 | at91_adc_writel(st, AT91_ADC_IDR, reg->drdy_mask); |
| 577 | |
| 578 | at91_adc_writel(st, reg->trigger_register, |
| 579 | status & ~value); |
| 580 | |
Octavian Purdila | 70dddee | 2015-03-02 21:03:05 +0200 | [diff] [blame] | 581 | for_each_set_bit(bit, idev->active_scan_mask, |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 582 | st->num_channels) { |
| 583 | struct iio_chan_spec const *chan = idev->channels + bit; |
| 584 | at91_adc_writel(st, AT91_ADC_CHDR, |
| 585 | AT91_ADC_CH(chan->channel)); |
| 586 | } |
| 587 | kfree(st->buffer); |
| 588 | } |
| 589 | |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | static const struct iio_trigger_ops at91_adc_trigger_ops = { |
| 594 | .owner = THIS_MODULE, |
| 595 | .set_trigger_state = &at91_adc_configure_trigger, |
| 596 | }; |
| 597 | |
| 598 | static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *idev, |
| 599 | struct at91_adc_trigger *trigger) |
| 600 | { |
| 601 | struct iio_trigger *trig; |
| 602 | int ret; |
| 603 | |
| 604 | trig = iio_trigger_alloc("%s-dev%d-%s", idev->name, |
| 605 | idev->id, trigger->name); |
| 606 | if (trig == NULL) |
| 607 | return NULL; |
| 608 | |
| 609 | trig->dev.parent = idev->dev.parent; |
Lars-Peter Clausen | 1e9663c | 2013-03-25 08:58:00 +0000 | [diff] [blame] | 610 | iio_trigger_set_drvdata(trig, idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 611 | trig->ops = &at91_adc_trigger_ops; |
| 612 | |
| 613 | ret = iio_trigger_register(trig); |
| 614 | if (ret) |
| 615 | return NULL; |
| 616 | |
| 617 | return trig; |
| 618 | } |
| 619 | |
| 620 | static int at91_adc_trigger_init(struct iio_dev *idev) |
| 621 | { |
| 622 | struct at91_adc_state *st = iio_priv(idev); |
| 623 | int i, ret; |
| 624 | |
Axel Lin | 6b3aa31 | 2012-10-29 08:25:00 +0000 | [diff] [blame] | 625 | st->trig = devm_kzalloc(&idev->dev, |
Thomas Meyer | 4287723 | 2013-09-19 22:42:00 +0100 | [diff] [blame] | 626 | st->trigger_number * sizeof(*st->trig), |
Axel Lin | 6b3aa31 | 2012-10-29 08:25:00 +0000 | [diff] [blame] | 627 | GFP_KERNEL); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 628 | |
| 629 | if (st->trig == NULL) { |
| 630 | ret = -ENOMEM; |
| 631 | goto error_ret; |
| 632 | } |
| 633 | |
| 634 | for (i = 0; i < st->trigger_number; i++) { |
| 635 | if (st->trigger_list[i].is_external && !(st->use_external)) |
| 636 | continue; |
| 637 | |
| 638 | st->trig[i] = at91_adc_allocate_trigger(idev, |
| 639 | st->trigger_list + i); |
| 640 | if (st->trig[i] == NULL) { |
| 641 | dev_err(&idev->dev, |
| 642 | "Could not allocate trigger %d\n", i); |
| 643 | ret = -ENOMEM; |
| 644 | goto error_trigger; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | return 0; |
| 649 | |
| 650 | error_trigger: |
| 651 | for (i--; i >= 0; i--) { |
| 652 | iio_trigger_unregister(st->trig[i]); |
| 653 | iio_trigger_free(st->trig[i]); |
| 654 | } |
| 655 | error_ret: |
| 656 | return ret; |
| 657 | } |
| 658 | |
| 659 | static void at91_adc_trigger_remove(struct iio_dev *idev) |
| 660 | { |
| 661 | struct at91_adc_state *st = iio_priv(idev); |
| 662 | int i; |
| 663 | |
| 664 | for (i = 0; i < st->trigger_number; i++) { |
| 665 | iio_trigger_unregister(st->trig[i]); |
| 666 | iio_trigger_free(st->trig[i]); |
| 667 | } |
| 668 | } |
| 669 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 670 | static int at91_adc_buffer_init(struct iio_dev *idev) |
| 671 | { |
Lars-Peter Clausen | 90032e4 | 2012-06-18 18:33:49 +0200 | [diff] [blame] | 672 | return iio_triggered_buffer_setup(idev, &iio_pollfunc_store_time, |
| 673 | &at91_adc_trigger_handler, NULL); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | static void at91_adc_buffer_remove(struct iio_dev *idev) |
| 677 | { |
Lars-Peter Clausen | 90032e4 | 2012-06-18 18:33:49 +0200 | [diff] [blame] | 678 | iio_triggered_buffer_cleanup(idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | static int at91_adc_read_raw(struct iio_dev *idev, |
| 682 | struct iio_chan_spec const *chan, |
| 683 | int *val, int *val2, long mask) |
| 684 | { |
| 685 | struct at91_adc_state *st = iio_priv(idev); |
| 686 | int ret; |
| 687 | |
| 688 | switch (mask) { |
| 689 | case IIO_CHAN_INFO_RAW: |
| 690 | mutex_lock(&st->lock); |
| 691 | |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 692 | st->chnb = chan->channel; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 693 | at91_adc_writel(st, AT91_ADC_CHER, |
| 694 | AT91_ADC_CH(chan->channel)); |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 695 | at91_adc_writel(st, AT91_ADC_IER, BIT(chan->channel)); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 696 | at91_adc_writel(st, AT91_ADC_CR, AT91_ADC_START); |
| 697 | |
| 698 | ret = wait_event_interruptible_timeout(st->wq_data_avail, |
| 699 | st->done, |
| 700 | msecs_to_jiffies(1000)); |
| 701 | if (ret == 0) |
Lars-Peter Clausen | 90e6dc7 | 2012-06-26 10:43:05 +0200 | [diff] [blame] | 702 | ret = -ETIMEDOUT; |
| 703 | if (ret < 0) { |
| 704 | mutex_unlock(&st->lock); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 705 | return ret; |
Lars-Peter Clausen | 90e6dc7 | 2012-06-26 10:43:05 +0200 | [diff] [blame] | 706 | } |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 707 | |
| 708 | *val = st->last_value; |
| 709 | |
| 710 | at91_adc_writel(st, AT91_ADC_CHDR, |
| 711 | AT91_ADC_CH(chan->channel)); |
Ludovic Desroches | d4f5195 | 2014-10-09 15:02:00 +0100 | [diff] [blame] | 712 | at91_adc_writel(st, AT91_ADC_IDR, BIT(chan->channel)); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 713 | |
| 714 | st->last_value = 0; |
| 715 | st->done = false; |
| 716 | mutex_unlock(&st->lock); |
| 717 | return IIO_VAL_INT; |
| 718 | |
| 719 | case IIO_CHAN_INFO_SCALE: |
Lars-Peter Clausen | c45e561 | 2013-09-28 10:31:00 +0100 | [diff] [blame] | 720 | *val = st->vref_mv; |
| 721 | *val2 = chan->scan_type.realbits; |
| 722 | return IIO_VAL_FRACTIONAL_LOG2; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 723 | default: |
| 724 | break; |
| 725 | } |
| 726 | return -EINVAL; |
| 727 | } |
| 728 | |
Ludovic Desroches | 47be16b | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 729 | static int at91_adc_of_get_resolution(struct at91_adc_state *st, |
| 730 | struct platform_device *pdev) |
| 731 | { |
| 732 | struct iio_dev *idev = iio_priv_to_dev(st); |
| 733 | struct device_node *np = pdev->dev.of_node; |
| 734 | int count, i, ret = 0; |
| 735 | char *res_name, *s; |
| 736 | u32 *resolutions; |
| 737 | |
| 738 | count = of_property_count_strings(np, "atmel,adc-res-names"); |
| 739 | if (count < 2) { |
| 740 | dev_err(&idev->dev, "You must specified at least two resolution names for " |
| 741 | "adc-res-names property in the DT\n"); |
| 742 | return count; |
| 743 | } |
| 744 | |
| 745 | resolutions = kmalloc(count * sizeof(*resolutions), GFP_KERNEL); |
| 746 | if (!resolutions) |
| 747 | return -ENOMEM; |
| 748 | |
| 749 | if (of_property_read_u32_array(np, "atmel,adc-res", resolutions, count)) { |
| 750 | dev_err(&idev->dev, "Missing adc-res property in the DT.\n"); |
| 751 | ret = -ENODEV; |
| 752 | goto ret; |
| 753 | } |
| 754 | |
| 755 | if (of_property_read_string(np, "atmel,adc-use-res", (const char **)&res_name)) |
| 756 | res_name = "highres"; |
| 757 | |
| 758 | for (i = 0; i < count; i++) { |
| 759 | if (of_property_read_string_index(np, "atmel,adc-res-names", i, (const char **)&s)) |
| 760 | continue; |
| 761 | |
| 762 | if (strcmp(res_name, s)) |
| 763 | continue; |
| 764 | |
| 765 | st->res = resolutions[i]; |
| 766 | if (!strcmp(res_name, "lowres")) |
| 767 | st->low_res = true; |
| 768 | else |
| 769 | st->low_res = false; |
| 770 | |
| 771 | dev_info(&idev->dev, "Resolution used: %u bits\n", st->res); |
| 772 | goto ret; |
| 773 | } |
| 774 | |
| 775 | dev_err(&idev->dev, "There is no resolution for %s\n", res_name); |
| 776 | |
| 777 | ret: |
| 778 | kfree(resolutions); |
| 779 | return ret; |
| 780 | } |
| 781 | |
Jan Leupold | 2ab5f39 | 2015-06-17 18:21:36 +0200 | [diff] [blame^] | 782 | static u32 calc_startup_ticks_9260(u32 startup_time, u32 adc_clk_khz) |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 783 | { |
| 784 | /* |
| 785 | * Number of ticks needed to cover the startup time of the ADC |
| 786 | * as defined in the electrical characteristics of the board, |
| 787 | * divided by 8. The formula thus is : |
| 788 | * Startup Time = (ticks + 1) * 8 / ADC Clock |
| 789 | */ |
| 790 | return round_up((startup_time * adc_clk_khz / 1000) - 1, 8) / 8; |
| 791 | } |
| 792 | |
Jan Leupold | 2ab5f39 | 2015-06-17 18:21:36 +0200 | [diff] [blame^] | 793 | static u32 calc_startup_ticks_9x5(u32 startup_time, u32 adc_clk_khz) |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 794 | { |
| 795 | /* |
| 796 | * For sama5d3x and at91sam9x5, the formula changes to: |
| 797 | * Startup Time = <lookup_table_value> / ADC Clock |
| 798 | */ |
| 799 | const int startup_lookup[] = { |
| 800 | 0 , 8 , 16 , 24 , |
| 801 | 64 , 80 , 96 , 112, |
| 802 | 512, 576, 640, 704, |
| 803 | 768, 832, 896, 960 |
| 804 | }; |
| 805 | int i, size = ARRAY_SIZE(startup_lookup); |
| 806 | unsigned int ticks; |
| 807 | |
| 808 | ticks = startup_time * adc_clk_khz / 1000; |
| 809 | for (i = 0; i < size; i++) |
| 810 | if (ticks < startup_lookup[i]) |
| 811 | break; |
| 812 | |
| 813 | ticks = i; |
| 814 | if (ticks == size) |
| 815 | /* Reach the end of lookup table */ |
| 816 | ticks = size - 1; |
| 817 | |
| 818 | return ticks; |
| 819 | } |
| 820 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 821 | static const struct of_device_id at91_adc_dt_ids[]; |
| 822 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 823 | static int at91_adc_probe_dt_ts(struct device_node *node, |
| 824 | struct at91_adc_state *st, struct device *dev) |
| 825 | { |
| 826 | int ret; |
| 827 | u32 prop; |
| 828 | |
| 829 | ret = of_property_read_u32(node, "atmel,adc-ts-wires", &prop); |
| 830 | if (ret) { |
| 831 | dev_info(dev, "ADC Touch screen is disabled.\n"); |
| 832 | return 0; |
| 833 | } |
| 834 | |
| 835 | switch (prop) { |
| 836 | case 4: |
| 837 | case 5: |
| 838 | st->touchscreen_type = prop; |
| 839 | break; |
| 840 | default: |
| 841 | dev_err(dev, "Unsupported number of touchscreen wires (%d). Should be 4 or 5.\n", prop); |
| 842 | return -EINVAL; |
| 843 | } |
| 844 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 845 | if (!st->caps->has_tsmr) |
| 846 | return 0; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 847 | prop = 0; |
| 848 | of_property_read_u32(node, "atmel,adc-ts-pressure-threshold", &prop); |
| 849 | st->ts_pressure_threshold = prop; |
| 850 | if (st->ts_pressure_threshold) { |
| 851 | return 0; |
| 852 | } else { |
| 853 | dev_err(dev, "Invalid pressure threshold for the touchscreen\n"); |
| 854 | return -EINVAL; |
| 855 | } |
| 856 | } |
| 857 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 858 | static int at91_adc_probe_dt(struct at91_adc_state *st, |
| 859 | struct platform_device *pdev) |
| 860 | { |
| 861 | struct iio_dev *idev = iio_priv_to_dev(st); |
| 862 | struct device_node *node = pdev->dev.of_node; |
| 863 | struct device_node *trig_node; |
| 864 | int i = 0, ret; |
| 865 | u32 prop; |
| 866 | |
| 867 | if (!node) |
| 868 | return -EINVAL; |
| 869 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 870 | st->caps = (struct at91_adc_caps *) |
| 871 | of_match_device(at91_adc_dt_ids, &pdev->dev)->data; |
| 872 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 873 | st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers"); |
| 874 | |
| 875 | if (of_property_read_u32(node, "atmel,adc-channels-used", &prop)) { |
| 876 | dev_err(&idev->dev, "Missing adc-channels-used property in the DT.\n"); |
| 877 | ret = -EINVAL; |
| 878 | goto error_ret; |
| 879 | } |
| 880 | st->channels_mask = prop; |
| 881 | |
Jean-Christophe PLAGNIOL-VILLARD | e748783 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 882 | st->sleep_mode = of_property_read_bool(node, "atmel,adc-sleep-mode"); |
| 883 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 884 | if (of_property_read_u32(node, "atmel,adc-startup-time", &prop)) { |
| 885 | dev_err(&idev->dev, "Missing adc-startup-time property in the DT.\n"); |
| 886 | ret = -EINVAL; |
| 887 | goto error_ret; |
| 888 | } |
| 889 | st->startup_time = prop; |
| 890 | |
Jean-Christophe PLAGNIOL-VILLARD | beca9e7 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 891 | prop = 0; |
| 892 | of_property_read_u32(node, "atmel,adc-sample-hold-time", &prop); |
| 893 | st->sample_hold_time = prop; |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 894 | |
| 895 | if (of_property_read_u32(node, "atmel,adc-vref", &prop)) { |
| 896 | dev_err(&idev->dev, "Missing adc-vref property in the DT.\n"); |
| 897 | ret = -EINVAL; |
| 898 | goto error_ret; |
| 899 | } |
| 900 | st->vref_mv = prop; |
| 901 | |
Ludovic Desroches | 47be16b | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 902 | ret = at91_adc_of_get_resolution(st, pdev); |
| 903 | if (ret) |
| 904 | goto error_ret; |
| 905 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 906 | st->registers = &st->caps->registers; |
Josh Wu | 2b6d598 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 907 | st->num_channels = st->caps->num_channels; |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 908 | st->trigger_number = of_get_child_count(node); |
Axel Lin | 6b3aa31 | 2012-10-29 08:25:00 +0000 | [diff] [blame] | 909 | st->trigger_list = devm_kzalloc(&idev->dev, st->trigger_number * |
| 910 | sizeof(struct at91_adc_trigger), |
| 911 | GFP_KERNEL); |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 912 | if (!st->trigger_list) { |
| 913 | dev_err(&idev->dev, "Could not allocate trigger list memory.\n"); |
| 914 | ret = -ENOMEM; |
| 915 | goto error_ret; |
| 916 | } |
| 917 | |
| 918 | for_each_child_of_node(node, trig_node) { |
| 919 | struct at91_adc_trigger *trig = st->trigger_list + i; |
| 920 | const char *name; |
| 921 | |
| 922 | if (of_property_read_string(trig_node, "trigger-name", &name)) { |
| 923 | dev_err(&idev->dev, "Missing trigger-name property in the DT.\n"); |
| 924 | ret = -EINVAL; |
| 925 | goto error_ret; |
| 926 | } |
| 927 | trig->name = name; |
| 928 | |
| 929 | if (of_property_read_u32(trig_node, "trigger-value", &prop)) { |
| 930 | dev_err(&idev->dev, "Missing trigger-value property in the DT.\n"); |
| 931 | ret = -EINVAL; |
| 932 | goto error_ret; |
| 933 | } |
| 934 | trig->value = prop; |
| 935 | trig->is_external = of_property_read_bool(trig_node, "trigger-external"); |
| 936 | i++; |
| 937 | } |
| 938 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 939 | /* Check if touchscreen is supported. */ |
| 940 | if (st->caps->has_ts) |
| 941 | return at91_adc_probe_dt_ts(node, st, &idev->dev); |
| 942 | else |
| 943 | dev_info(&idev->dev, "not support touchscreen in the adc compatible string.\n"); |
| 944 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 945 | return 0; |
| 946 | |
| 947 | error_ret: |
| 948 | return ret; |
| 949 | } |
| 950 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 951 | static int at91_adc_probe_pdata(struct at91_adc_state *st, |
| 952 | struct platform_device *pdev) |
| 953 | { |
| 954 | struct at91_adc_data *pdata = pdev->dev.platform_data; |
| 955 | |
| 956 | if (!pdata) |
| 957 | return -EINVAL; |
| 958 | |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 959 | st->caps = (struct at91_adc_caps *) |
| 960 | platform_get_device_id(pdev)->driver_data; |
| 961 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 962 | st->use_external = pdata->use_external_triggers; |
| 963 | st->vref_mv = pdata->vref; |
| 964 | st->channels_mask = pdata->channels_used; |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 965 | st->num_channels = st->caps->num_channels; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 966 | st->startup_time = pdata->startup_time; |
| 967 | st->trigger_number = pdata->trigger_number; |
| 968 | st->trigger_list = pdata->trigger_list; |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 969 | st->registers = &st->caps->registers; |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 970 | st->touchscreen_type = pdata->touchscreen_type; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | static const struct iio_info at91_adc_info = { |
| 976 | .driver_module = THIS_MODULE, |
| 977 | .read_raw = &at91_adc_read_raw, |
| 978 | }; |
| 979 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 980 | /* Touchscreen related functions */ |
| 981 | static int atmel_ts_open(struct input_dev *dev) |
| 982 | { |
| 983 | struct at91_adc_state *st = input_get_drvdata(dev); |
| 984 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 985 | if (st->caps->has_tsmr) |
| 986 | at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN); |
| 987 | else |
| 988 | at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN); |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 989 | return 0; |
| 990 | } |
| 991 | |
| 992 | static void atmel_ts_close(struct input_dev *dev) |
| 993 | { |
| 994 | struct at91_adc_state *st = input_get_drvdata(dev); |
| 995 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 996 | if (st->caps->has_tsmr) |
| 997 | at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN); |
| 998 | else |
| 999 | at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN); |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1000 | } |
| 1001 | |
| 1002 | static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz) |
| 1003 | { |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1004 | u32 reg = 0; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1005 | int i = 0; |
| 1006 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1007 | /* a Pen Detect Debounce Time is necessary for the ADC Touch to avoid |
| 1008 | * pen detect noise. |
| 1009 | * The formula is : Pen Detect Debounce Time = (2 ^ pendbc) / ADCClock |
| 1010 | */ |
| 1011 | st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz / |
| 1012 | 1000, 1); |
| 1013 | |
| 1014 | while (st->ts_pendbc >> ++i) |
| 1015 | ; /* Empty! Find the shift offset */ |
| 1016 | if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1)))) |
| 1017 | st->ts_pendbc = i; |
| 1018 | else |
| 1019 | st->ts_pendbc = i - 1; |
| 1020 | |
| 1021 | if (!st->caps->has_tsmr) { |
| 1022 | reg = at91_adc_readl(st, AT91_ADC_MR); |
| 1023 | reg |= AT91_ADC_TSAMOD_TS_ONLY_MODE | AT91_ADC_PENDET; |
| 1024 | |
| 1025 | reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC; |
| 1026 | at91_adc_writel(st, AT91_ADC_MR, reg); |
| 1027 | |
| 1028 | reg = AT91_ADC_TSR_SHTIM_(TOUCH_SHTIM) & AT91_ADC_TSR_SHTIM; |
| 1029 | at91_adc_writel(st, AT91_ADC_TSR, reg); |
| 1030 | |
| 1031 | st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL * |
| 1032 | adc_clk_khz / 1000) - 1, 1); |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1037 | if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE) |
| 1038 | reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS; |
| 1039 | else |
| 1040 | reg = AT91_ADC_TSMR_TSMODE_5WIRE; |
| 1041 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1042 | reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average) |
| 1043 | & AT91_ADC_TSMR_TSAV; |
| 1044 | reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC; |
| 1045 | reg |= AT91_ADC_TSMR_NOTSDMA; |
| 1046 | reg |= AT91_ADC_TSMR_PENDET_ENA; |
| 1047 | reg |= 0x03 << 8; /* TSFREQ, needs to be bigger than TSAV */ |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1048 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1049 | at91_adc_writel(st, AT91_ADC_TSMR, reg); |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1050 | |
| 1051 | /* Change adc internal resistor value for better pen detection, |
| 1052 | * default value is 100 kOhm. |
| 1053 | * 0 = 200 kOhm, 1 = 150 kOhm, 2 = 100 kOhm, 3 = 50 kOhm |
| 1054 | * option only available on ES2 and higher |
| 1055 | */ |
| 1056 | at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity |
| 1057 | & AT91_ADC_ACR_PENDETSENS); |
| 1058 | |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1059 | /* Sample Period Time = (TRGPER + 1) / ADCClock */ |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1060 | st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US * |
| 1061 | adc_clk_khz / 1000) - 1, 1); |
| 1062 | |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
| 1066 | static int at91_ts_register(struct at91_adc_state *st, |
| 1067 | struct platform_device *pdev) |
| 1068 | { |
| 1069 | struct input_dev *input; |
| 1070 | struct iio_dev *idev = iio_priv_to_dev(st); |
| 1071 | int ret; |
| 1072 | |
| 1073 | input = input_allocate_device(); |
| 1074 | if (!input) { |
| 1075 | dev_err(&idev->dev, "Failed to allocate TS device!\n"); |
| 1076 | return -ENOMEM; |
| 1077 | } |
| 1078 | |
| 1079 | input->name = DRIVER_NAME; |
| 1080 | input->id.bustype = BUS_HOST; |
| 1081 | input->dev.parent = &pdev->dev; |
| 1082 | input->open = atmel_ts_open; |
| 1083 | input->close = atmel_ts_close; |
| 1084 | |
| 1085 | __set_bit(EV_ABS, input->evbit); |
| 1086 | __set_bit(EV_KEY, input->evbit); |
| 1087 | __set_bit(BTN_TOUCH, input->keybit); |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1088 | if (st->caps->has_tsmr) { |
| 1089 | input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1, |
| 1090 | 0, 0); |
| 1091 | input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1, |
| 1092 | 0, 0); |
| 1093 | input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0); |
| 1094 | } else { |
| 1095 | if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) { |
| 1096 | dev_err(&pdev->dev, |
| 1097 | "This touchscreen controller only support 4 wires\n"); |
| 1098 | ret = -EINVAL; |
| 1099 | goto err; |
| 1100 | } |
| 1101 | |
| 1102 | input_set_abs_params(input, ABS_X, 0, (1 << MAX_RLPOS_BITS) - 1, |
| 1103 | 0, 0); |
| 1104 | input_set_abs_params(input, ABS_Y, 0, (1 << MAX_RLPOS_BITS) - 1, |
| 1105 | 0, 0); |
| 1106 | } |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1107 | |
| 1108 | st->ts_input = input; |
| 1109 | input_set_drvdata(input, st); |
| 1110 | |
| 1111 | ret = input_register_device(input); |
| 1112 | if (ret) |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1113 | goto err; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1114 | |
| 1115 | return ret; |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1116 | |
| 1117 | err: |
| 1118 | input_free_device(st->ts_input); |
| 1119 | return ret; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | static void at91_ts_unregister(struct at91_adc_state *st) |
| 1123 | { |
| 1124 | input_unregister_device(st->ts_input); |
| 1125 | } |
| 1126 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 1127 | static int at91_adc_probe(struct platform_device *pdev) |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1128 | { |
Josh Wu | db10e20 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1129 | unsigned int prsc, mstrclk, ticks, adc_clk, adc_clk_khz, shtim; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1130 | int ret; |
| 1131 | struct iio_dev *idev; |
| 1132 | struct at91_adc_state *st; |
| 1133 | struct resource *res; |
Jean-Christophe PLAGNIOL-VILLARD | e748783 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1134 | u32 reg; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1135 | |
Sachin Kamat | f883753 | 2013-07-22 12:02:00 +0100 | [diff] [blame] | 1136 | idev = devm_iio_device_alloc(&pdev->dev, sizeof(struct at91_adc_state)); |
| 1137 | if (!idev) |
| 1138 | return -ENOMEM; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1139 | |
| 1140 | st = iio_priv(idev); |
| 1141 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 1142 | if (pdev->dev.of_node) |
| 1143 | ret = at91_adc_probe_dt(st, pdev); |
| 1144 | else |
| 1145 | ret = at91_adc_probe_pdata(st, pdev); |
| 1146 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1147 | if (ret) { |
| 1148 | dev_err(&pdev->dev, "No platform data available.\n"); |
Sachin Kamat | f883753 | 2013-07-22 12:02:00 +0100 | [diff] [blame] | 1149 | return -EINVAL; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1150 | } |
| 1151 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1152 | platform_set_drvdata(pdev, idev); |
| 1153 | |
| 1154 | idev->dev.parent = &pdev->dev; |
| 1155 | idev->name = dev_name(&pdev->dev); |
| 1156 | idev->modes = INDIO_DIRECT_MODE; |
| 1157 | idev->info = &at91_adc_info; |
| 1158 | |
| 1159 | st->irq = platform_get_irq(pdev, 0); |
| 1160 | if (st->irq < 0) { |
| 1161 | dev_err(&pdev->dev, "No IRQ ID is designated\n"); |
Sachin Kamat | f883753 | 2013-07-22 12:02:00 +0100 | [diff] [blame] | 1162 | return -ENODEV; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1163 | } |
| 1164 | |
Julia Lawall | 390d75c | 2012-07-31 14:09:00 +0100 | [diff] [blame] | 1165 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1166 | |
Thierry Reding | 5fd9846 | 2013-01-21 11:09:04 +0100 | [diff] [blame] | 1167 | st->reg_base = devm_ioremap_resource(&pdev->dev, res); |
| 1168 | if (IS_ERR(st->reg_base)) { |
Sachin Kamat | f883753 | 2013-07-22 12:02:00 +0100 | [diff] [blame] | 1169 | return PTR_ERR(st->reg_base); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * Disable all IRQs before setting up the handler |
| 1174 | */ |
| 1175 | at91_adc_writel(st, AT91_ADC_CR, AT91_ADC_SWRST); |
| 1176 | at91_adc_writel(st, AT91_ADC_IDR, 0xFFFFFFFF); |
Alexandre Belloni | 84882b0 | 2014-04-15 12:27:59 +0200 | [diff] [blame] | 1177 | |
| 1178 | if (st->caps->has_tsmr) |
| 1179 | ret = request_irq(st->irq, at91_adc_9x5_interrupt, 0, |
| 1180 | pdev->dev.driver->name, idev); |
| 1181 | else |
| 1182 | ret = request_irq(st->irq, at91_adc_rl_interrupt, 0, |
| 1183 | pdev->dev.driver->name, idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1184 | if (ret) { |
| 1185 | dev_err(&pdev->dev, "Failed to allocate IRQ.\n"); |
Sachin Kamat | f883753 | 2013-07-22 12:02:00 +0100 | [diff] [blame] | 1186 | return ret; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1187 | } |
| 1188 | |
Julia Lawall | 390d75c | 2012-07-31 14:09:00 +0100 | [diff] [blame] | 1189 | st->clk = devm_clk_get(&pdev->dev, "adc_clk"); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1190 | if (IS_ERR(st->clk)) { |
| 1191 | dev_err(&pdev->dev, "Failed to get the clock.\n"); |
| 1192 | ret = PTR_ERR(st->clk); |
| 1193 | goto error_free_irq; |
| 1194 | } |
| 1195 | |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1196 | ret = clk_prepare_enable(st->clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1197 | if (ret) { |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1198 | dev_err(&pdev->dev, |
| 1199 | "Could not prepare or enable the clock.\n"); |
Julia Lawall | 390d75c | 2012-07-31 14:09:00 +0100 | [diff] [blame] | 1200 | goto error_free_irq; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1201 | } |
| 1202 | |
Julia Lawall | 390d75c | 2012-07-31 14:09:00 +0100 | [diff] [blame] | 1203 | st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk"); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1204 | if (IS_ERR(st->adc_clk)) { |
| 1205 | dev_err(&pdev->dev, "Failed to get the ADC clock.\n"); |
Julia Lawall | f755bbb | 2012-08-25 21:57:09 +0200 | [diff] [blame] | 1206 | ret = PTR_ERR(st->adc_clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1207 | goto error_disable_clk; |
| 1208 | } |
| 1209 | |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1210 | ret = clk_prepare_enable(st->adc_clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1211 | if (ret) { |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1212 | dev_err(&pdev->dev, |
| 1213 | "Could not prepare or enable the ADC clock.\n"); |
Julia Lawall | 390d75c | 2012-07-31 14:09:00 +0100 | [diff] [blame] | 1214 | goto error_disable_clk; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1215 | } |
| 1216 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1217 | /* |
| 1218 | * Prescaler rate computation using the formula from the Atmel's |
| 1219 | * datasheet : ADC Clock = MCK / ((Prescaler + 1) * 2), ADC Clock being |
| 1220 | * specified by the electrical characteristics of the board. |
| 1221 | */ |
| 1222 | mstrclk = clk_get_rate(st->clk); |
| 1223 | adc_clk = clk_get_rate(st->adc_clk); |
Josh Wu | db10e20 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1224 | adc_clk_khz = adc_clk / 1000; |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1225 | |
| 1226 | dev_dbg(&pdev->dev, "Master clock is set as: %d Hz, adc_clk should set as: %d Hz\n", |
| 1227 | mstrclk, adc_clk); |
| 1228 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1229 | prsc = (mstrclk / (2 * adc_clk)) - 1; |
| 1230 | |
| 1231 | if (!st->startup_time) { |
| 1232 | dev_err(&pdev->dev, "No startup time available.\n"); |
| 1233 | ret = -EINVAL; |
| 1234 | goto error_disable_adc_clk; |
| 1235 | } |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1236 | ticks = (*st->caps->calc_startup_ticks)(st->startup_time, adc_clk_khz); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1237 | |
| 1238 | /* |
Jean-Christophe PLAGNIOL-VILLARD | beca9e7 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1239 | * a minimal Sample and Hold Time is necessary for the ADC to guarantee |
| 1240 | * the best converted final value between two channels selection |
| 1241 | * The formula thus is : Sample and Hold Time = (shtim + 1) / ADCClock |
| 1242 | */ |
Alexandre Belloni | 8f32b6b | 2014-03-03 18:07:00 +0000 | [diff] [blame] | 1243 | if (st->sample_hold_time > 0) |
| 1244 | shtim = round_up((st->sample_hold_time * adc_clk_khz / 1000) |
| 1245 | - 1, 1); |
| 1246 | else |
| 1247 | shtim = 0; |
Jean-Christophe PLAGNIOL-VILLARD | beca9e7 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1248 | |
Josh Wu | 9120c0b | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1249 | reg = AT91_ADC_PRESCAL_(prsc) & st->registers->mr_prescal_mask; |
| 1250 | reg |= AT91_ADC_STARTUP_(ticks) & st->registers->mr_startup_mask; |
Ludovic Desroches | 47be16b | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1251 | if (st->low_res) |
Jean-Christophe PLAGNIOL-VILLARD | e748783 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1252 | reg |= AT91_ADC_LOWRES; |
| 1253 | if (st->sleep_mode) |
| 1254 | reg |= AT91_ADC_SLEEP; |
Jean-Christophe PLAGNIOL-VILLARD | beca9e7 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1255 | reg |= AT91_ADC_SHTIM_(shtim) & AT91_ADC_SHTIM; |
Jean-Christophe PLAGNIOL-VILLARD | e748783 | 2013-03-29 14:54:00 +0000 | [diff] [blame] | 1256 | at91_adc_writel(st, AT91_ADC_MR, reg); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1257 | |
| 1258 | /* Setup the ADC channels available on the board */ |
| 1259 | ret = at91_adc_channel_init(idev); |
| 1260 | if (ret < 0) { |
| 1261 | dev_err(&pdev->dev, "Couldn't initialize the channels.\n"); |
| 1262 | goto error_disable_adc_clk; |
| 1263 | } |
| 1264 | |
| 1265 | init_waitqueue_head(&st->wq_data_avail); |
| 1266 | mutex_init(&st->lock); |
| 1267 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1268 | /* |
| 1269 | * Since touch screen will set trigger register as period trigger. So |
| 1270 | * when touch screen is enabled, then we have to disable hardware |
| 1271 | * trigger for classic adc. |
| 1272 | */ |
| 1273 | if (!st->touchscreen_type) { |
| 1274 | ret = at91_adc_buffer_init(idev); |
| 1275 | if (ret < 0) { |
| 1276 | dev_err(&pdev->dev, "Couldn't initialize the buffer.\n"); |
| 1277 | goto error_disable_adc_clk; |
| 1278 | } |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1279 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1280 | ret = at91_adc_trigger_init(idev); |
| 1281 | if (ret < 0) { |
| 1282 | dev_err(&pdev->dev, "Couldn't setup the triggers.\n"); |
| 1283 | at91_adc_buffer_remove(idev); |
| 1284 | goto error_disable_adc_clk; |
| 1285 | } |
| 1286 | } else { |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1287 | ret = at91_ts_register(st, pdev); |
| 1288 | if (ret) |
| 1289 | goto error_disable_adc_clk; |
| 1290 | |
| 1291 | at91_ts_hw_init(st, adc_clk_khz); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1292 | } |
| 1293 | |
| 1294 | ret = iio_device_register(idev); |
| 1295 | if (ret < 0) { |
| 1296 | dev_err(&pdev->dev, "Couldn't register the device.\n"); |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1297 | goto error_iio_device_register; |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1298 | } |
| 1299 | |
| 1300 | return 0; |
| 1301 | |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1302 | error_iio_device_register: |
| 1303 | if (!st->touchscreen_type) { |
| 1304 | at91_adc_trigger_remove(idev); |
| 1305 | at91_adc_buffer_remove(idev); |
| 1306 | } else { |
| 1307 | at91_ts_unregister(st); |
| 1308 | } |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1309 | error_disable_adc_clk: |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1310 | clk_disable_unprepare(st->adc_clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1311 | error_disable_clk: |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1312 | clk_disable_unprepare(st->clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1313 | error_free_irq: |
| 1314 | free_irq(st->irq, idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1315 | return ret; |
| 1316 | } |
| 1317 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 1318 | static int at91_adc_remove(struct platform_device *pdev) |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1319 | { |
| 1320 | struct iio_dev *idev = platform_get_drvdata(pdev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1321 | struct at91_adc_state *st = iio_priv(idev); |
| 1322 | |
| 1323 | iio_device_unregister(idev); |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1324 | if (!st->touchscreen_type) { |
| 1325 | at91_adc_trigger_remove(idev); |
| 1326 | at91_adc_buffer_remove(idev); |
| 1327 | } else { |
| 1328 | at91_ts_unregister(st); |
| 1329 | } |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1330 | clk_disable_unprepare(st->adc_clk); |
Julia Lawall | 00062a9c | 2012-08-26 17:00:00 +0100 | [diff] [blame] | 1331 | clk_disable_unprepare(st->clk); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1332 | free_irq(st->irq, idev); |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1333 | |
| 1334 | return 0; |
| 1335 | } |
| 1336 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1337 | static struct at91_adc_caps at91sam9260_caps = { |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1338 | .calc_startup_ticks = calc_startup_ticks_9260, |
Josh Wu | 2b6d598 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1339 | .num_channels = 4, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1340 | .registers = { |
| 1341 | .channel_base = AT91_ADC_CHR(0), |
| 1342 | .drdy_mask = AT91_ADC_DRDY, |
| 1343 | .status_register = AT91_ADC_SR, |
| 1344 | .trigger_register = AT91_ADC_TRGR_9260, |
Josh Wu | 9120c0b | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1345 | .mr_prescal_mask = AT91_ADC_PRESCAL_9260, |
| 1346 | .mr_startup_mask = AT91_ADC_STARTUP_9260, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1347 | }, |
| 1348 | }; |
| 1349 | |
Alexandre Belloni | 65b1fdb | 2014-04-15 12:28:02 +0200 | [diff] [blame] | 1350 | static struct at91_adc_caps at91sam9rl_caps = { |
| 1351 | .has_ts = true, |
| 1352 | .calc_startup_ticks = calc_startup_ticks_9260, /* same as 9260 */ |
| 1353 | .num_channels = 6, |
| 1354 | .registers = { |
| 1355 | .channel_base = AT91_ADC_CHR(0), |
| 1356 | .drdy_mask = AT91_ADC_DRDY, |
| 1357 | .status_register = AT91_ADC_SR, |
| 1358 | .trigger_register = AT91_ADC_TRGR_9G45, |
| 1359 | .mr_prescal_mask = AT91_ADC_PRESCAL_9260, |
| 1360 | .mr_startup_mask = AT91_ADC_STARTUP_9G45, |
| 1361 | }, |
| 1362 | }; |
| 1363 | |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1364 | static struct at91_adc_caps at91sam9g45_caps = { |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1365 | .has_ts = true, |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1366 | .calc_startup_ticks = calc_startup_ticks_9260, /* same as 9260 */ |
Josh Wu | 2b6d598 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1367 | .num_channels = 8, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1368 | .registers = { |
| 1369 | .channel_base = AT91_ADC_CHR(0), |
| 1370 | .drdy_mask = AT91_ADC_DRDY, |
| 1371 | .status_register = AT91_ADC_SR, |
| 1372 | .trigger_register = AT91_ADC_TRGR_9G45, |
Josh Wu | 9120c0b | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1373 | .mr_prescal_mask = AT91_ADC_PRESCAL_9G45, |
| 1374 | .mr_startup_mask = AT91_ADC_STARTUP_9G45, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1375 | }, |
| 1376 | }; |
| 1377 | |
| 1378 | static struct at91_adc_caps at91sam9x5_caps = { |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1379 | .has_ts = true, |
| 1380 | .has_tsmr = true, |
| 1381 | .ts_filter_average = 3, |
| 1382 | .ts_pen_detect_sensitivity = 2, |
Josh Wu | c460166 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1383 | .calc_startup_ticks = calc_startup_ticks_9x5, |
Josh Wu | 2b6d598 | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1384 | .num_channels = 12, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1385 | .registers = { |
| 1386 | .channel_base = AT91_ADC_CDR0_9X5, |
| 1387 | .drdy_mask = AT91_ADC_SR_DRDY_9X5, |
| 1388 | .status_register = AT91_ADC_SR_9X5, |
| 1389 | .trigger_register = AT91_ADC_TRGR_9X5, |
Josh Wu | 9120c0b | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1390 | /* prescal mask is same as 9G45 */ |
| 1391 | .mr_prescal_mask = AT91_ADC_PRESCAL_9G45, |
| 1392 | .mr_startup_mask = AT91_ADC_STARTUP_9X5, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1393 | }, |
| 1394 | }; |
| 1395 | |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 1396 | static const struct of_device_id at91_adc_dt_ids[] = { |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1397 | { .compatible = "atmel,at91sam9260-adc", .data = &at91sam9260_caps }, |
Alexandre Belloni | 65b1fdb | 2014-04-15 12:28:02 +0200 | [diff] [blame] | 1398 | { .compatible = "atmel,at91sam9rl-adc", .data = &at91sam9rl_caps }, |
Josh Wu | e1811f9 | 2013-08-27 12:28:00 +0100 | [diff] [blame] | 1399 | { .compatible = "atmel,at91sam9g45-adc", .data = &at91sam9g45_caps }, |
| 1400 | { .compatible = "atmel,at91sam9x5-adc", .data = &at91sam9x5_caps }, |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 1401 | {}, |
| 1402 | }; |
| 1403 | MODULE_DEVICE_TABLE(of, at91_adc_dt_ids); |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 1404 | |
| 1405 | static const struct platform_device_id at91_adc_ids[] = { |
| 1406 | { |
| 1407 | .name = "at91sam9260-adc", |
| 1408 | .driver_data = (unsigned long)&at91sam9260_caps, |
| 1409 | }, { |
Alexandre Belloni | 65b1fdb | 2014-04-15 12:28:02 +0200 | [diff] [blame] | 1410 | .name = "at91sam9rl-adc", |
| 1411 | .driver_data = (unsigned long)&at91sam9rl_caps, |
| 1412 | }, { |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 1413 | .name = "at91sam9g45-adc", |
| 1414 | .driver_data = (unsigned long)&at91sam9g45_caps, |
| 1415 | }, { |
| 1416 | .name = "at91sam9x5-adc", |
| 1417 | .driver_data = (unsigned long)&at91sam9x5_caps, |
| 1418 | }, { |
| 1419 | /* terminator */ |
| 1420 | } |
| 1421 | }; |
| 1422 | MODULE_DEVICE_TABLE(platform, at91_adc_ids); |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 1423 | |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1424 | static struct platform_driver at91_adc_driver = { |
| 1425 | .probe = at91_adc_probe, |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 1426 | .remove = at91_adc_remove, |
Alexandre Belloni | 467a44b | 2014-05-03 16:57:00 +0100 | [diff] [blame] | 1427 | .id_table = at91_adc_ids, |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1428 | .driver = { |
Josh Wu | c8b11de | 2013-10-08 04:48:00 +0100 | [diff] [blame] | 1429 | .name = DRIVER_NAME, |
Maxime Ripard | e364185 | 2012-05-11 15:35:37 +0200 | [diff] [blame] | 1430 | .of_match_table = of_match_ptr(at91_adc_dt_ids), |
Maxime Ripard | 0e589d5 | 2012-05-11 15:35:33 +0200 | [diff] [blame] | 1431 | }, |
| 1432 | }; |
| 1433 | |
| 1434 | module_platform_driver(at91_adc_driver); |
| 1435 | |
| 1436 | MODULE_LICENSE("GPL"); |
| 1437 | MODULE_DESCRIPTION("Atmel AT91 ADC Driver"); |
| 1438 | MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); |