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