Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/net/irda/pxaficp_ir.c |
| 3 | * |
| 4 | * Based on sa1100_ir.c by Russell King |
| 5 | * |
| 6 | * Changes copyright (C) 2003-2005 MontaVista Software, Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * Infra-red driver (SIR/FIR) for the PXA2xx embedded microprocessor |
| 13 | * |
| 14 | */ |
Alexey Dobriyan | b7f080c | 2011-06-16 11:01:34 +0000 | [diff] [blame^] | 15 | #include <linux/dma-mapping.h> |
Alexey Dobriyan | a6b7a40 | 2011-06-06 10:43:46 +0000 | [diff] [blame] | 16 | #include <linux/interrupt.h> |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 17 | #include <linux/module.h> |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 18 | #include <linux/netdevice.h> |
Alexander Beregalov | f6a2629 | 2009-04-16 15:23:03 +0000 | [diff] [blame] | 19 | #include <linux/etherdevice.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 20 | #include <linux/platform_device.h> |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 21 | #include <linux/clk.h> |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 24 | |
| 25 | #include <net/irda/irda.h> |
| 26 | #include <net/irda/irmod.h> |
| 27 | #include <net/irda/wrapper.h> |
| 28 | #include <net/irda/irda_device.h> |
| 29 | |
Russell King | dcea83a | 2008-11-29 11:40:28 +0000 | [diff] [blame] | 30 | #include <mach/dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/irda.h> |
Eric Miao | 02f6526 | 2008-11-28 14:08:53 +0800 | [diff] [blame] | 32 | #include <mach/regs-uart.h> |
Eric Miao | 5bf3df3 | 2009-01-20 11:04:16 +0800 | [diff] [blame] | 33 | #include <mach/regs-ost.h> |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 34 | |
Eric Miao | b40ddf5 | 2008-11-28 11:13:47 +0800 | [diff] [blame] | 35 | #define FICP __REG(0x40800000) /* Start of FICP area */ |
| 36 | #define ICCR0 __REG(0x40800000) /* ICP Control Register 0 */ |
| 37 | #define ICCR1 __REG(0x40800004) /* ICP Control Register 1 */ |
| 38 | #define ICCR2 __REG(0x40800008) /* ICP Control Register 2 */ |
| 39 | #define ICDR __REG(0x4080000c) /* ICP Data Register */ |
| 40 | #define ICSR0 __REG(0x40800014) /* ICP Status Register 0 */ |
| 41 | #define ICSR1 __REG(0x40800018) /* ICP Status Register 1 */ |
| 42 | |
| 43 | #define ICCR0_AME (1 << 7) /* Address match enable */ |
| 44 | #define ICCR0_TIE (1 << 6) /* Transmit FIFO interrupt enable */ |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 45 | #define ICCR0_RIE (1 << 5) /* Receive FIFO interrupt enable */ |
Eric Miao | b40ddf5 | 2008-11-28 11:13:47 +0800 | [diff] [blame] | 46 | #define ICCR0_RXE (1 << 4) /* Receive enable */ |
| 47 | #define ICCR0_TXE (1 << 3) /* Transmit enable */ |
| 48 | #define ICCR0_TUS (1 << 2) /* Transmit FIFO underrun select */ |
| 49 | #define ICCR0_LBM (1 << 1) /* Loopback mode */ |
| 50 | #define ICCR0_ITR (1 << 0) /* IrDA transmission */ |
| 51 | |
| 52 | #define ICCR2_RXP (1 << 3) /* Receive Pin Polarity select */ |
| 53 | #define ICCR2_TXP (1 << 2) /* Transmit Pin Polarity select */ |
| 54 | #define ICCR2_TRIG (3 << 0) /* Receive FIFO Trigger threshold */ |
| 55 | #define ICCR2_TRIG_8 (0 << 0) /* >= 8 bytes */ |
| 56 | #define ICCR2_TRIG_16 (1 << 0) /* >= 16 bytes */ |
| 57 | #define ICCR2_TRIG_32 (2 << 0) /* >= 32 bytes */ |
| 58 | |
| 59 | #ifdef CONFIG_PXA27x |
| 60 | #define ICSR0_EOC (1 << 6) /* DMA End of Descriptor Chain */ |
| 61 | #endif |
| 62 | #define ICSR0_FRE (1 << 5) /* Framing error */ |
| 63 | #define ICSR0_RFS (1 << 4) /* Receive FIFO service request */ |
| 64 | #define ICSR0_TFS (1 << 3) /* Transnit FIFO service request */ |
| 65 | #define ICSR0_RAB (1 << 2) /* Receiver abort */ |
| 66 | #define ICSR0_TUR (1 << 1) /* Trunsmit FIFO underun */ |
| 67 | #define ICSR0_EIF (1 << 0) /* End/Error in FIFO */ |
| 68 | |
| 69 | #define ICSR1_ROR (1 << 6) /* Receiver FIFO underrun */ |
| 70 | #define ICSR1_CRE (1 << 5) /* CRC error */ |
| 71 | #define ICSR1_EOF (1 << 4) /* End of frame */ |
| 72 | #define ICSR1_TNF (1 << 3) /* Transmit FIFO not full */ |
| 73 | #define ICSR1_RNE (1 << 2) /* Receive FIFO not empty */ |
| 74 | #define ICSR1_TBY (1 << 1) /* Tramsmiter busy flag */ |
| 75 | #define ICSR1_RSY (1 << 0) /* Recevier synchronized flag */ |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 76 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 77 | #define IrSR_RXPL_NEG_IS_ZERO (1<<4) |
| 78 | #define IrSR_RXPL_POS_IS_ZERO 0x0 |
| 79 | #define IrSR_TXPL_NEG_IS_ZERO (1<<3) |
| 80 | #define IrSR_TXPL_POS_IS_ZERO 0x0 |
| 81 | #define IrSR_XMODE_PULSE_1_6 (1<<2) |
| 82 | #define IrSR_XMODE_PULSE_3_16 0x0 |
| 83 | #define IrSR_RCVEIR_IR_MODE (1<<1) |
| 84 | #define IrSR_RCVEIR_UART_MODE 0x0 |
| 85 | #define IrSR_XMITIR_IR_MODE (1<<0) |
| 86 | #define IrSR_XMITIR_UART_MODE 0x0 |
| 87 | |
| 88 | #define IrSR_IR_RECEIVE_ON (\ |
| 89 | IrSR_RXPL_NEG_IS_ZERO | \ |
| 90 | IrSR_TXPL_POS_IS_ZERO | \ |
| 91 | IrSR_XMODE_PULSE_3_16 | \ |
| 92 | IrSR_RCVEIR_IR_MODE | \ |
| 93 | IrSR_XMITIR_UART_MODE) |
| 94 | |
| 95 | #define IrSR_IR_TRANSMIT_ON (\ |
| 96 | IrSR_RXPL_NEG_IS_ZERO | \ |
| 97 | IrSR_TXPL_POS_IS_ZERO | \ |
| 98 | IrSR_XMODE_PULSE_3_16 | \ |
| 99 | IrSR_RCVEIR_UART_MODE | \ |
| 100 | IrSR_XMITIR_IR_MODE) |
| 101 | |
| 102 | struct pxa_irda { |
| 103 | int speed; |
| 104 | int newspeed; |
| 105 | unsigned long last_oscr; |
| 106 | |
| 107 | unsigned char *dma_rx_buff; |
| 108 | unsigned char *dma_tx_buff; |
| 109 | dma_addr_t dma_rx_buff_phy; |
| 110 | dma_addr_t dma_tx_buff_phy; |
| 111 | unsigned int dma_tx_buff_len; |
| 112 | int txdma; |
| 113 | int rxdma; |
| 114 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 115 | struct irlap_cb *irlap; |
| 116 | struct qos_info qos; |
| 117 | |
| 118 | iobuff_t tx_buff; |
| 119 | iobuff_t rx_buff; |
| 120 | |
| 121 | struct device *dev; |
| 122 | struct pxaficp_platform_data *pdata; |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 123 | struct clk *fir_clk; |
| 124 | struct clk *sir_clk; |
| 125 | struct clk *cur_clk; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 126 | }; |
| 127 | |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 128 | static inline void pxa_irda_disable_clk(struct pxa_irda *si) |
| 129 | { |
| 130 | if (si->cur_clk) |
| 131 | clk_disable(si->cur_clk); |
| 132 | si->cur_clk = NULL; |
| 133 | } |
| 134 | |
| 135 | static inline void pxa_irda_enable_firclk(struct pxa_irda *si) |
| 136 | { |
| 137 | si->cur_clk = si->fir_clk; |
| 138 | clk_enable(si->fir_clk); |
| 139 | } |
| 140 | |
| 141 | static inline void pxa_irda_enable_sirclk(struct pxa_irda *si) |
| 142 | { |
| 143 | si->cur_clk = si->sir_clk; |
| 144 | clk_enable(si->sir_clk); |
| 145 | } |
| 146 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 147 | |
| 148 | #define IS_FIR(si) ((si)->speed >= 4000000) |
| 149 | #define IRDA_FRAME_SIZE_LIMIT 2047 |
| 150 | |
| 151 | inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si) |
| 152 | { |
| 153 | DCSR(si->rxdma) = DCSR_NODESC; |
| 154 | DSADR(si->rxdma) = __PREG(ICDR); |
| 155 | DTADR(si->rxdma) = si->dma_rx_buff_phy; |
| 156 | DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT; |
| 157 | DCSR(si->rxdma) |= DCSR_RUN; |
| 158 | } |
| 159 | |
| 160 | inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si) |
| 161 | { |
| 162 | DCSR(si->txdma) = DCSR_NODESC; |
| 163 | DSADR(si->txdma) = si->dma_tx_buff_phy; |
| 164 | DTADR(si->txdma) = __PREG(ICDR); |
| 165 | DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len; |
| 166 | DCSR(si->txdma) |= DCSR_RUN; |
| 167 | } |
| 168 | |
| 169 | /* |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 170 | * Set the IrDA communications mode. |
| 171 | */ |
| 172 | static void pxa_irda_set_mode(struct pxa_irda *si, int mode) |
| 173 | { |
| 174 | if (si->pdata->transceiver_mode) |
| 175 | si->pdata->transceiver_mode(si->dev, mode); |
| 176 | else { |
| 177 | if (gpio_is_valid(si->pdata->gpio_pwdown)) |
| 178 | gpio_set_value(si->pdata->gpio_pwdown, |
| 179 | !(mode & IR_OFF) ^ |
| 180 | !si->pdata->gpio_pwdown_inverted); |
| 181 | pxa2xx_transceiver_mode(si->dev, mode); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 186 | * Set the IrDA communications speed. |
| 187 | */ |
| 188 | static int pxa_irda_set_speed(struct pxa_irda *si, int speed) |
| 189 | { |
| 190 | unsigned long flags; |
| 191 | unsigned int divisor; |
| 192 | |
| 193 | switch (speed) { |
| 194 | case 9600: case 19200: case 38400: |
| 195 | case 57600: case 115200: |
| 196 | |
| 197 | /* refer to PXA250/210 Developer's Manual 10-7 */ |
| 198 | /* BaudRate = 14.7456 MHz / (16*Divisor) */ |
| 199 | divisor = 14745600 / (16 * speed); |
| 200 | |
| 201 | local_irq_save(flags); |
| 202 | |
| 203 | if (IS_FIR(si)) { |
| 204 | /* stop RX DMA */ |
| 205 | DCSR(si->rxdma) &= ~DCSR_RUN; |
| 206 | /* disable FICP */ |
| 207 | ICCR0 = 0; |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 208 | pxa_irda_disable_clk(si); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 209 | |
| 210 | /* set board transceiver to SIR mode */ |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 211 | pxa_irda_set_mode(si, IR_SIRMODE); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 212 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 213 | /* enable the STUART clock */ |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 214 | pxa_irda_enable_sirclk(si); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* disable STUART first */ |
| 218 | STIER = 0; |
| 219 | |
| 220 | /* access DLL & DLH */ |
| 221 | STLCR |= LCR_DLAB; |
| 222 | STDLL = divisor & 0xff; |
| 223 | STDLH = divisor >> 8; |
| 224 | STLCR &= ~LCR_DLAB; |
| 225 | |
| 226 | si->speed = speed; |
| 227 | STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; |
| 228 | STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; |
| 229 | |
| 230 | local_irq_restore(flags); |
| 231 | break; |
| 232 | |
| 233 | case 4000000: |
| 234 | local_irq_save(flags); |
| 235 | |
| 236 | /* disable STUART */ |
| 237 | STIER = 0; |
| 238 | STISR = 0; |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 239 | pxa_irda_disable_clk(si); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 240 | |
| 241 | /* disable FICP first */ |
| 242 | ICCR0 = 0; |
| 243 | |
| 244 | /* set board transceiver to FIR mode */ |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 245 | pxa_irda_set_mode(si, IR_FIRMODE); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 246 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 247 | /* enable the FICP clock */ |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 248 | pxa_irda_enable_firclk(si); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 249 | |
| 250 | si->speed = speed; |
| 251 | pxa_irda_fir_dma_rx_start(si); |
| 252 | ICCR0 = ICCR0_ITR | ICCR0_RXE; |
| 253 | |
| 254 | local_irq_restore(flags); |
| 255 | break; |
| 256 | |
| 257 | default: |
| 258 | return -EINVAL; |
| 259 | } |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | /* SIR interrupt service routine. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 265 | static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 266 | { |
| 267 | struct net_device *dev = dev_id; |
| 268 | struct pxa_irda *si = netdev_priv(dev); |
| 269 | int iir, lsr, data; |
| 270 | |
| 271 | iir = STIIR; |
| 272 | |
| 273 | switch (iir & 0x0F) { |
| 274 | case 0x06: /* Receiver Line Status */ |
| 275 | lsr = STLSR; |
| 276 | while (lsr & LSR_FIFOE) { |
| 277 | data = STRBR; |
| 278 | if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) { |
| 279 | printk(KERN_DEBUG "pxa_ir: sir receiving error\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 280 | dev->stats.rx_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 281 | if (lsr & LSR_FE) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 282 | dev->stats.rx_frame_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 283 | if (lsr & LSR_OE) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 284 | dev->stats.rx_fifo_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 285 | } else { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 286 | dev->stats.rx_bytes++; |
| 287 | async_unwrap_char(dev, &dev->stats, |
| 288 | &si->rx_buff, data); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 289 | } |
| 290 | lsr = STLSR; |
| 291 | } |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 292 | si->last_oscr = OSCR; |
| 293 | break; |
| 294 | |
| 295 | case 0x04: /* Received Data Available */ |
| 296 | /* forth through */ |
| 297 | |
| 298 | case 0x0C: /* Character Timeout Indication */ |
| 299 | do { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 300 | dev->stats.rx_bytes++; |
| 301 | async_unwrap_char(dev, &dev->stats, &si->rx_buff, STRBR); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 302 | } while (STLSR & LSR_DR); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 303 | si->last_oscr = OSCR; |
| 304 | break; |
| 305 | |
| 306 | case 0x02: /* Transmit FIFO Data Request */ |
| 307 | while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) { |
| 308 | STTHR = *si->tx_buff.data++; |
| 309 | si->tx_buff.len -= 1; |
| 310 | } |
| 311 | |
| 312 | if (si->tx_buff.len == 0) { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 313 | dev->stats.tx_packets++; |
| 314 | dev->stats.tx_bytes += si->tx_buff.data - si->tx_buff.head; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 315 | |
| 316 | /* We need to ensure that the transmitter has finished. */ |
| 317 | while ((STLSR & LSR_TEMT) == 0) |
| 318 | cpu_relax(); |
| 319 | si->last_oscr = OSCR; |
| 320 | |
| 321 | /* |
| 322 | * Ok, we've finished transmitting. Now enable |
| 323 | * the receiver. Sometimes we get a receive IRQ |
| 324 | * immediately after a transmit... |
| 325 | */ |
| 326 | if (si->newspeed) { |
| 327 | pxa_irda_set_speed(si, si->newspeed); |
| 328 | si->newspeed = 0; |
| 329 | } else { |
| 330 | /* enable IR Receiver, disable IR Transmitter */ |
| 331 | STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; |
| 332 | /* enable STUART and receive interrupts */ |
| 333 | STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; |
| 334 | } |
| 335 | /* I'm hungry! */ |
| 336 | netif_wake_queue(dev); |
| 337 | } |
| 338 | break; |
| 339 | } |
| 340 | |
| 341 | return IRQ_HANDLED; |
| 342 | } |
| 343 | |
| 344 | /* FIR Receive DMA interrupt handler */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 345 | static void pxa_irda_fir_dma_rx_irq(int channel, void *data) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 346 | { |
| 347 | int dcsr = DCSR(channel); |
| 348 | |
| 349 | DCSR(channel) = dcsr & ~DCSR_RUN; |
| 350 | |
| 351 | printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr); |
| 352 | } |
| 353 | |
| 354 | /* FIR Transmit DMA interrupt handler */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 355 | static void pxa_irda_fir_dma_tx_irq(int channel, void *data) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 356 | { |
| 357 | struct net_device *dev = data; |
| 358 | struct pxa_irda *si = netdev_priv(dev); |
| 359 | int dcsr; |
| 360 | |
| 361 | dcsr = DCSR(channel); |
| 362 | DCSR(channel) = dcsr & ~DCSR_RUN; |
| 363 | |
| 364 | if (dcsr & DCSR_ENDINTR) { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 365 | dev->stats.tx_packets++; |
| 366 | dev->stats.tx_bytes += si->dma_tx_buff_len; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 367 | } else { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 368 | dev->stats.tx_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | while (ICSR1 & ICSR1_TBY) |
| 372 | cpu_relax(); |
| 373 | si->last_oscr = OSCR; |
| 374 | |
| 375 | /* |
| 376 | * HACK: It looks like the TBY bit is dropped too soon. |
| 377 | * Without this delay things break. |
| 378 | */ |
| 379 | udelay(120); |
| 380 | |
| 381 | if (si->newspeed) { |
| 382 | pxa_irda_set_speed(si, si->newspeed); |
| 383 | si->newspeed = 0; |
| 384 | } else { |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 385 | int i = 64; |
| 386 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 387 | ICCR0 = 0; |
| 388 | pxa_irda_fir_dma_rx_start(si); |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 389 | while ((ICSR1 & ICSR1_RNE) && i--) |
| 390 | (void)ICDR; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 391 | ICCR0 = ICCR0_ITR | ICCR0_RXE; |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 392 | |
| 393 | if (i < 0) |
| 394 | printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 395 | } |
| 396 | netif_wake_queue(dev); |
| 397 | } |
| 398 | |
| 399 | /* EIF(Error in FIFO/End in Frame) handler for FIR */ |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 400 | static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 401 | { |
| 402 | unsigned int len, stat, data; |
| 403 | |
| 404 | /* Get the current data position. */ |
| 405 | len = DTADR(si->rxdma) - si->dma_rx_buff_phy; |
| 406 | |
| 407 | do { |
| 408 | /* Read Status, and then Data. */ |
| 409 | stat = ICSR1; |
| 410 | rmb(); |
| 411 | data = ICDR; |
| 412 | |
| 413 | if (stat & (ICSR1_CRE | ICSR1_ROR)) { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 414 | dev->stats.rx_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 415 | if (stat & ICSR1_CRE) { |
| 416 | printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 417 | dev->stats.rx_crc_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 418 | } |
| 419 | if (stat & ICSR1_ROR) { |
| 420 | printk(KERN_DEBUG "pxa_ir: fir receive overrun\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 421 | dev->stats.rx_over_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 422 | } |
| 423 | } else { |
| 424 | si->dma_rx_buff[len++] = data; |
| 425 | } |
| 426 | /* If we hit the end of frame, there's no point in continuing. */ |
| 427 | if (stat & ICSR1_EOF) |
| 428 | break; |
| 429 | } while (ICSR0 & ICSR0_EIF); |
| 430 | |
| 431 | if (stat & ICSR1_EOF) { |
| 432 | /* end of frame. */ |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 433 | struct sk_buff *skb; |
| 434 | |
| 435 | if (icsr0 & ICSR0_FRE) { |
| 436 | printk(KERN_ERR "pxa_ir: dropping erroneous frame\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 437 | dev->stats.rx_dropped++; |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 438 | return; |
| 439 | } |
| 440 | |
| 441 | skb = alloc_skb(len+1,GFP_ATOMIC); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 442 | if (!skb) { |
| 443 | printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 444 | dev->stats.rx_dropped++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 445 | return; |
| 446 | } |
| 447 | |
| 448 | /* Align IP header to 20 bytes */ |
| 449 | skb_reserve(skb, 1); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 450 | skb_copy_to_linear_data(skb, si->dma_rx_buff, len); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 451 | skb_put(skb, len); |
| 452 | |
| 453 | /* Feed it to IrLAP */ |
| 454 | skb->dev = dev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 455 | skb_reset_mac_header(skb); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 456 | skb->protocol = htons(ETH_P_IRDA); |
| 457 | netif_rx(skb); |
| 458 | |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 459 | dev->stats.rx_packets++; |
| 460 | dev->stats.rx_bytes += len; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 461 | } |
| 462 | } |
| 463 | |
| 464 | /* FIR interrupt handler */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 465 | static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 466 | { |
| 467 | struct net_device *dev = dev_id; |
| 468 | struct pxa_irda *si = netdev_priv(dev); |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 469 | int icsr0, i = 64; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 470 | |
| 471 | /* stop RX DMA */ |
| 472 | DCSR(si->rxdma) &= ~DCSR_RUN; |
| 473 | si->last_oscr = OSCR; |
| 474 | icsr0 = ICSR0; |
| 475 | |
| 476 | if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { |
| 477 | if (icsr0 & ICSR0_FRE) { |
| 478 | printk(KERN_DEBUG "pxa_ir: fir receive frame error\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 479 | dev->stats.rx_frame_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 480 | } else { |
| 481 | printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 482 | dev->stats.rx_errors++; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 483 | } |
| 484 | ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); |
| 485 | } |
| 486 | |
| 487 | if (icsr0 & ICSR0_EIF) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 488 | /* An error in FIFO occurred, or there is a end of frame */ |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 489 | pxa_irda_fir_irq_eif(si, dev, icsr0); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | ICCR0 = 0; |
| 493 | pxa_irda_fir_dma_rx_start(si); |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 494 | while ((ICSR1 & ICSR1_RNE) && i--) |
| 495 | (void)ICDR; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 496 | ICCR0 = ICCR0_ITR | ICCR0_RXE; |
| 497 | |
Guennadi Liakhovetski | 9a4d93d | 2007-03-30 08:49:55 +0100 | [diff] [blame] | 498 | if (i < 0) |
| 499 | printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); |
| 500 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 501 | return IRQ_HANDLED; |
| 502 | } |
| 503 | |
| 504 | /* hard_xmit interface of irda device */ |
| 505 | static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) |
| 506 | { |
| 507 | struct pxa_irda *si = netdev_priv(dev); |
| 508 | int speed = irda_get_next_speed(skb); |
| 509 | |
| 510 | /* |
| 511 | * Does this packet contain a request to change the interface |
| 512 | * speed? If so, remember it until we complete the transmission |
| 513 | * of this frame. |
| 514 | */ |
| 515 | if (speed != si->speed && speed != -1) |
| 516 | si->newspeed = speed; |
| 517 | |
| 518 | /* |
| 519 | * If this is an empty frame, we can bypass a lot. |
| 520 | */ |
| 521 | if (skb->len == 0) { |
| 522 | if (si->newspeed) { |
| 523 | si->newspeed = 0; |
| 524 | pxa_irda_set_speed(si, speed); |
| 525 | } |
| 526 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 527 | return NETDEV_TX_OK; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | netif_stop_queue(dev); |
| 531 | |
| 532 | if (!IS_FIR(si)) { |
| 533 | si->tx_buff.data = si->tx_buff.head; |
| 534 | si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize); |
| 535 | |
| 536 | /* Disable STUART interrupts and switch to transmit mode. */ |
| 537 | STIER = 0; |
| 538 | STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6; |
| 539 | |
| 540 | /* enable STUART and transmit interrupts */ |
| 541 | STIER = IER_UUE | IER_TIE; |
| 542 | } else { |
| 543 | unsigned long mtt = irda_get_mtt(skb); |
| 544 | |
| 545 | si->dma_tx_buff_len = skb->len; |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 546 | skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 547 | |
| 548 | if (mtt) |
| 549 | while ((unsigned)(OSCR - si->last_oscr)/4 < mtt) |
| 550 | cpu_relax(); |
| 551 | |
| 552 | /* stop RX DMA, disable FICP */ |
| 553 | DCSR(si->rxdma) &= ~DCSR_RUN; |
| 554 | ICCR0 = 0; |
| 555 | |
| 556 | pxa_irda_fir_dma_tx_start(si); |
| 557 | ICCR0 = ICCR0_ITR | ICCR0_TXE; |
| 558 | } |
| 559 | |
| 560 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 561 | return NETDEV_TX_OK; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd) |
| 565 | { |
| 566 | struct if_irda_req *rq = (struct if_irda_req *)ifreq; |
| 567 | struct pxa_irda *si = netdev_priv(dev); |
| 568 | int ret; |
| 569 | |
| 570 | switch (cmd) { |
| 571 | case SIOCSBANDWIDTH: |
| 572 | ret = -EPERM; |
| 573 | if (capable(CAP_NET_ADMIN)) { |
| 574 | /* |
| 575 | * We are unable to set the speed if the |
| 576 | * device is not running. |
| 577 | */ |
| 578 | if (netif_running(dev)) { |
| 579 | ret = pxa_irda_set_speed(si, |
| 580 | rq->ifr_baudrate); |
| 581 | } else { |
| 582 | printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n"); |
| 583 | ret = 0; |
| 584 | } |
| 585 | } |
| 586 | break; |
| 587 | |
| 588 | case SIOCSMEDIABUSY: |
| 589 | ret = -EPERM; |
| 590 | if (capable(CAP_NET_ADMIN)) { |
| 591 | irda_device_set_media_busy(dev, TRUE); |
| 592 | ret = 0; |
| 593 | } |
| 594 | break; |
| 595 | |
| 596 | case SIOCGRECEIVING: |
| 597 | ret = 0; |
| 598 | rq->ifr_receiving = IS_FIR(si) ? 0 |
| 599 | : si->rx_buff.state != OUTSIDE_FRAME; |
| 600 | break; |
| 601 | |
| 602 | default: |
| 603 | ret = -EOPNOTSUPP; |
| 604 | break; |
| 605 | } |
| 606 | |
| 607 | return ret; |
| 608 | } |
| 609 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 610 | static void pxa_irda_startup(struct pxa_irda *si) |
| 611 | { |
| 612 | /* Disable STUART interrupts */ |
| 613 | STIER = 0; |
| 614 | /* enable STUART interrupt to the processor */ |
| 615 | STMCR = MCR_OUT2; |
| 616 | /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */ |
| 617 | STLCR = LCR_WLS0 | LCR_WLS1; |
| 618 | /* enable FIFO, we use FIFO to improve performance */ |
| 619 | STFCR = FCR_TRFIFOE | FCR_ITL_32; |
| 620 | |
| 621 | /* disable FICP */ |
| 622 | ICCR0 = 0; |
| 623 | /* configure FICP ICCR2 */ |
| 624 | ICCR2 = ICCR2_TXP | ICCR2_TRIG_32; |
| 625 | |
| 626 | /* configure DMAC */ |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 627 | DRCMR(17) = si->rxdma | DRCMR_MAPVLD; |
| 628 | DRCMR(18) = si->txdma | DRCMR_MAPVLD; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 629 | |
| 630 | /* force SIR reinitialization */ |
| 631 | si->speed = 4000000; |
| 632 | pxa_irda_set_speed(si, 9600); |
| 633 | |
| 634 | printk(KERN_DEBUG "pxa_ir: irda startup\n"); |
| 635 | } |
| 636 | |
| 637 | static void pxa_irda_shutdown(struct pxa_irda *si) |
| 638 | { |
| 639 | unsigned long flags; |
| 640 | |
| 641 | local_irq_save(flags); |
| 642 | |
| 643 | /* disable STUART and interrupt */ |
| 644 | STIER = 0; |
| 645 | /* disable STUART SIR mode */ |
| 646 | STISR = 0; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 647 | |
| 648 | /* disable DMA */ |
| 649 | DCSR(si->txdma) &= ~DCSR_RUN; |
| 650 | DCSR(si->rxdma) &= ~DCSR_RUN; |
| 651 | /* disable FICP */ |
| 652 | ICCR0 = 0; |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 653 | |
| 654 | /* disable the STUART or FICP clocks */ |
| 655 | pxa_irda_disable_clk(si); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 656 | |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 657 | DRCMR(17) = 0; |
| 658 | DRCMR(18) = 0; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 659 | |
| 660 | local_irq_restore(flags); |
| 661 | |
| 662 | /* power off board transceiver */ |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 663 | pxa_irda_set_mode(si, IR_OFF); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 664 | |
| 665 | printk(KERN_DEBUG "pxa_ir: irda shutdown\n"); |
| 666 | } |
| 667 | |
| 668 | static int pxa_irda_start(struct net_device *dev) |
| 669 | { |
| 670 | struct pxa_irda *si = netdev_priv(dev); |
| 671 | int err; |
| 672 | |
| 673 | si->speed = 9600; |
| 674 | |
| 675 | err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev); |
| 676 | if (err) |
| 677 | goto err_irq1; |
| 678 | |
| 679 | err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev); |
| 680 | if (err) |
| 681 | goto err_irq2; |
| 682 | |
| 683 | /* |
| 684 | * The interrupt must remain disabled for now. |
| 685 | */ |
| 686 | disable_irq(IRQ_STUART); |
| 687 | disable_irq(IRQ_ICP); |
| 688 | |
| 689 | err = -EBUSY; |
| 690 | si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev); |
| 691 | if (si->rxdma < 0) |
| 692 | goto err_rx_dma; |
| 693 | |
| 694 | si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev); |
| 695 | if (si->txdma < 0) |
| 696 | goto err_tx_dma; |
| 697 | |
| 698 | err = -ENOMEM; |
| 699 | si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, |
| 700 | &si->dma_rx_buff_phy, GFP_KERNEL ); |
| 701 | if (!si->dma_rx_buff) |
| 702 | goto err_dma_rx_buff; |
| 703 | |
| 704 | si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, |
| 705 | &si->dma_tx_buff_phy, GFP_KERNEL ); |
| 706 | if (!si->dma_tx_buff) |
| 707 | goto err_dma_tx_buff; |
| 708 | |
| 709 | /* Setup the serial port for the initial speed. */ |
| 710 | pxa_irda_startup(si); |
| 711 | |
| 712 | /* |
| 713 | * Open a new IrLAP layer instance. |
| 714 | */ |
| 715 | si->irlap = irlap_open(dev, &si->qos, "pxa"); |
| 716 | err = -ENOMEM; |
| 717 | if (!si->irlap) |
| 718 | goto err_irlap; |
| 719 | |
| 720 | /* |
| 721 | * Now enable the interrupt and start the queue |
| 722 | */ |
| 723 | enable_irq(IRQ_STUART); |
| 724 | enable_irq(IRQ_ICP); |
| 725 | netif_start_queue(dev); |
| 726 | |
| 727 | printk(KERN_DEBUG "pxa_ir: irda driver opened\n"); |
| 728 | |
| 729 | return 0; |
| 730 | |
| 731 | err_irlap: |
| 732 | pxa_irda_shutdown(si); |
| 733 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); |
| 734 | err_dma_tx_buff: |
| 735 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); |
| 736 | err_dma_rx_buff: |
| 737 | pxa_free_dma(si->txdma); |
| 738 | err_tx_dma: |
| 739 | pxa_free_dma(si->rxdma); |
| 740 | err_rx_dma: |
| 741 | free_irq(IRQ_ICP, dev); |
| 742 | err_irq2: |
| 743 | free_irq(IRQ_STUART, dev); |
| 744 | err_irq1: |
| 745 | |
| 746 | return err; |
| 747 | } |
| 748 | |
| 749 | static int pxa_irda_stop(struct net_device *dev) |
| 750 | { |
| 751 | struct pxa_irda *si = netdev_priv(dev); |
| 752 | |
| 753 | netif_stop_queue(dev); |
| 754 | |
| 755 | pxa_irda_shutdown(si); |
| 756 | |
| 757 | /* Stop IrLAP */ |
| 758 | if (si->irlap) { |
| 759 | irlap_close(si->irlap); |
| 760 | si->irlap = NULL; |
| 761 | } |
| 762 | |
| 763 | free_irq(IRQ_STUART, dev); |
| 764 | free_irq(IRQ_ICP, dev); |
| 765 | |
| 766 | pxa_free_dma(si->rxdma); |
| 767 | pxa_free_dma(si->txdma); |
| 768 | |
| 769 | if (si->dma_rx_buff) |
| 770 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); |
| 771 | if (si->dma_tx_buff) |
| 772 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); |
| 773 | |
| 774 | printk(KERN_DEBUG "pxa_ir: irda driver closed\n"); |
| 775 | return 0; |
| 776 | } |
| 777 | |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 778 | static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 779 | { |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 780 | struct net_device *dev = platform_get_drvdata(_dev); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 781 | struct pxa_irda *si; |
| 782 | |
Richard Purdie | 91e1a51 | 2005-10-30 14:38:52 +0000 | [diff] [blame] | 783 | if (dev && netif_running(dev)) { |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 784 | si = netdev_priv(dev); |
| 785 | netif_device_detach(dev); |
| 786 | pxa_irda_shutdown(si); |
| 787 | } |
| 788 | |
| 789 | return 0; |
| 790 | } |
| 791 | |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 792 | static int pxa_irda_resume(struct platform_device *_dev) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 793 | { |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 794 | struct net_device *dev = platform_get_drvdata(_dev); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 795 | struct pxa_irda *si; |
| 796 | |
Richard Purdie | 91e1a51 | 2005-10-30 14:38:52 +0000 | [diff] [blame] | 797 | if (dev && netif_running(dev)) { |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 798 | si = netdev_priv(dev); |
| 799 | pxa_irda_startup(si); |
| 800 | netif_device_attach(dev); |
| 801 | netif_wake_queue(dev); |
| 802 | } |
| 803 | |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | |
| 808 | static int pxa_irda_init_iobuf(iobuff_t *io, int size) |
| 809 | { |
| 810 | io->head = kmalloc(size, GFP_KERNEL | GFP_DMA); |
| 811 | if (io->head != NULL) { |
| 812 | io->truesize = size; |
| 813 | io->in_frame = FALSE; |
| 814 | io->state = OUTSIDE_FRAME; |
| 815 | io->data = io->head; |
| 816 | } |
| 817 | return io->head ? 0 : -ENOMEM; |
| 818 | } |
| 819 | |
Alexander Beregalov | c76ccd6 | 2009-04-15 12:52:41 +0000 | [diff] [blame] | 820 | static const struct net_device_ops pxa_irda_netdev_ops = { |
| 821 | .ndo_open = pxa_irda_start, |
| 822 | .ndo_stop = pxa_irda_stop, |
| 823 | .ndo_start_xmit = pxa_irda_hard_xmit, |
| 824 | .ndo_do_ioctl = pxa_irda_ioctl, |
Alexander Beregalov | c76ccd6 | 2009-04-15 12:52:41 +0000 | [diff] [blame] | 825 | }; |
| 826 | |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 827 | static int pxa_irda_probe(struct platform_device *pdev) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 828 | { |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 829 | struct net_device *dev; |
| 830 | struct pxa_irda *si; |
| 831 | unsigned int baudrate_mask; |
| 832 | int err; |
| 833 | |
| 834 | if (!pdev->dev.platform_data) |
| 835 | return -ENODEV; |
| 836 | |
| 837 | err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY; |
| 838 | if (err) |
| 839 | goto err_mem_1; |
| 840 | |
| 841 | err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY; |
| 842 | if (err) |
| 843 | goto err_mem_2; |
| 844 | |
| 845 | dev = alloc_irdadev(sizeof(struct pxa_irda)); |
| 846 | if (!dev) |
| 847 | goto err_mem_3; |
| 848 | |
Marek Vasut | d2f3ad4 | 2009-08-23 22:57:30 -0700 | [diff] [blame] | 849 | SET_NETDEV_DEV(dev, &pdev->dev); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 850 | si = netdev_priv(dev); |
| 851 | si->dev = &pdev->dev; |
| 852 | si->pdata = pdev->dev.platform_data; |
| 853 | |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 854 | si->sir_clk = clk_get(&pdev->dev, "UARTCLK"); |
| 855 | si->fir_clk = clk_get(&pdev->dev, "FICPCLK"); |
| 856 | if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) { |
| 857 | err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk); |
| 858 | goto err_mem_4; |
| 859 | } |
| 860 | |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 861 | /* |
| 862 | * Initialise the SIR buffers |
| 863 | */ |
| 864 | err = pxa_irda_init_iobuf(&si->rx_buff, 14384); |
| 865 | if (err) |
| 866 | goto err_mem_4; |
| 867 | err = pxa_irda_init_iobuf(&si->tx_buff, 4000); |
| 868 | if (err) |
| 869 | goto err_mem_5; |
| 870 | |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 871 | if (gpio_is_valid(si->pdata->gpio_pwdown)) { |
| 872 | err = gpio_request(si->pdata->gpio_pwdown, "IrDA switch"); |
| 873 | if (err) |
| 874 | goto err_startup; |
| 875 | err = gpio_direction_output(si->pdata->gpio_pwdown, |
| 876 | !si->pdata->gpio_pwdown_inverted); |
| 877 | if (err) { |
| 878 | gpio_free(si->pdata->gpio_pwdown); |
| 879 | goto err_startup; |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | if (si->pdata->startup) { |
Dmitry Baryshkov | baf1c5d | 2008-04-12 20:08:16 +0100 | [diff] [blame] | 884 | err = si->pdata->startup(si->dev); |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 885 | if (err) |
| 886 | goto err_startup; |
| 887 | } |
| 888 | |
| 889 | if (gpio_is_valid(si->pdata->gpio_pwdown) && si->pdata->startup) |
| 890 | dev_warn(si->dev, "gpio_pwdown and startup() both defined!\n"); |
Dmitry Baryshkov | baf1c5d | 2008-04-12 20:08:16 +0100 | [diff] [blame] | 891 | |
Alexander Beregalov | c76ccd6 | 2009-04-15 12:52:41 +0000 | [diff] [blame] | 892 | dev->netdev_ops = &pxa_irda_netdev_ops; |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 893 | |
| 894 | irda_init_max_qos_capabilies(&si->qos); |
| 895 | |
| 896 | baudrate_mask = 0; |
| 897 | if (si->pdata->transceiver_cap & IR_SIRMODE) |
| 898 | baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; |
| 899 | if (si->pdata->transceiver_cap & IR_FIRMODE) |
| 900 | baudrate_mask |= IR_4000000 << 8; |
| 901 | |
| 902 | si->qos.baud_rate.bits &= baudrate_mask; |
| 903 | si->qos.min_turn_time.bits = 7; /* 1ms or more */ |
| 904 | |
| 905 | irda_qos_bits_to_value(&si->qos); |
| 906 | |
| 907 | err = register_netdev(dev); |
| 908 | |
| 909 | if (err == 0) |
| 910 | dev_set_drvdata(&pdev->dev, dev); |
| 911 | |
| 912 | if (err) { |
Dmitry Baryshkov | baf1c5d | 2008-04-12 20:08:16 +0100 | [diff] [blame] | 913 | if (si->pdata->shutdown) |
| 914 | si->pdata->shutdown(si->dev); |
| 915 | err_startup: |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 916 | kfree(si->tx_buff.head); |
| 917 | err_mem_5: |
| 918 | kfree(si->rx_buff.head); |
| 919 | err_mem_4: |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 920 | if (si->sir_clk && !IS_ERR(si->sir_clk)) |
| 921 | clk_put(si->sir_clk); |
| 922 | if (si->fir_clk && !IS_ERR(si->fir_clk)) |
| 923 | clk_put(si->fir_clk); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 924 | free_netdev(dev); |
| 925 | err_mem_3: |
| 926 | release_mem_region(__PREG(FICP), 0x1c); |
| 927 | err_mem_2: |
| 928 | release_mem_region(__PREG(STUART), 0x24); |
| 929 | } |
| 930 | err_mem_1: |
| 931 | return err; |
| 932 | } |
| 933 | |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 934 | static int pxa_irda_remove(struct platform_device *_dev) |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 935 | { |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 936 | struct net_device *dev = platform_get_drvdata(_dev); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 937 | |
| 938 | if (dev) { |
| 939 | struct pxa_irda *si = netdev_priv(dev); |
| 940 | unregister_netdev(dev); |
Marek Vasut | c4bd017 | 2009-07-17 12:50:43 +0200 | [diff] [blame] | 941 | if (gpio_is_valid(si->pdata->gpio_pwdown)) |
| 942 | gpio_free(si->pdata->gpio_pwdown); |
Dmitry Baryshkov | baf1c5d | 2008-04-12 20:08:16 +0100 | [diff] [blame] | 943 | if (si->pdata->shutdown) |
| 944 | si->pdata->shutdown(si->dev); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 945 | kfree(si->tx_buff.head); |
| 946 | kfree(si->rx_buff.head); |
Russell King | 82d553c | 2007-09-02 17:09:23 +0100 | [diff] [blame] | 947 | clk_put(si->fir_clk); |
| 948 | clk_put(si->sir_clk); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 949 | free_netdev(dev); |
| 950 | } |
| 951 | |
| 952 | release_mem_region(__PREG(STUART), 0x24); |
| 953 | release_mem_region(__PREG(FICP), 0x1c); |
| 954 | |
| 955 | return 0; |
| 956 | } |
| 957 | |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 958 | static struct platform_driver pxa_ir_driver = { |
| 959 | .driver = { |
| 960 | .name = "pxa2xx-ir", |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 961 | .owner = THIS_MODULE, |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 962 | }, |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 963 | .probe = pxa_irda_probe, |
| 964 | .remove = pxa_irda_remove, |
| 965 | .suspend = pxa_irda_suspend, |
| 966 | .resume = pxa_irda_resume, |
| 967 | }; |
| 968 | |
| 969 | static int __init pxa_irda_init(void) |
| 970 | { |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 971 | return platform_driver_register(&pxa_ir_driver); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | static void __exit pxa_irda_exit(void) |
| 975 | { |
Paul Sokolovsky | b259e7d | 2006-12-06 20:07:59 -0800 | [diff] [blame] | 976 | platform_driver_unregister(&pxa_ir_driver); |
Nicolas Pitre | 6f475c0 | 2005-10-28 16:39:33 +0100 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | module_init(pxa_irda_init); |
| 980 | module_exit(pxa_irda_exit); |
| 981 | |
| 982 | MODULE_LICENSE("GPL"); |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 983 | MODULE_ALIAS("platform:pxa2xx-ir"); |