Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Alchemy Semi Au1000 IrDA driver |
| 3 | * |
| 4 | * Copyright 2001 MontaVista Software Inc. |
| 5 | * Author: MontaVista Software, Inc. |
| 6 | * ppopov@mvista.com or source@mvista.com |
| 7 | * |
| 8 | * This program is free software; you can distribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License (Version 2) as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 15 | * for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
Jeff Kirsher | e8478de | 2013-12-06 06:28:44 -0800 | [diff] [blame] | 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 21 | #include <linux/clk.h> |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/slab.h> |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 27 | #include <linux/types.h> |
Silviu-Mihai Popescu | 94d8f2b1 | 2013-03-16 21:03:46 +0000 | [diff] [blame] | 28 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #include <net/irda/irda.h> |
| 31 | #include <net/irda/irmod.h> |
| 32 | #include <net/irda/wrapper.h> |
| 33 | #include <net/irda/irda_device.h> |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 34 | #include <asm/mach-au1x00/au1000.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 36 | /* registers */ |
| 37 | #define IR_RING_PTR_STATUS 0x00 |
| 38 | #define IR_RING_BASE_ADDR_H 0x04 |
| 39 | #define IR_RING_BASE_ADDR_L 0x08 |
| 40 | #define IR_RING_SIZE 0x0C |
| 41 | #define IR_RING_PROMPT 0x10 |
| 42 | #define IR_RING_ADDR_CMPR 0x14 |
| 43 | #define IR_INT_CLEAR 0x18 |
| 44 | #define IR_CONFIG_1 0x20 |
| 45 | #define IR_SIR_FLAGS 0x24 |
| 46 | #define IR_STATUS 0x28 |
| 47 | #define IR_READ_PHY_CONFIG 0x2C |
| 48 | #define IR_WRITE_PHY_CONFIG 0x30 |
| 49 | #define IR_MAX_PKT_LEN 0x34 |
| 50 | #define IR_RX_BYTE_CNT 0x38 |
| 51 | #define IR_CONFIG_2 0x3C |
| 52 | #define IR_ENABLE 0x40 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 54 | /* Config1 */ |
| 55 | #define IR_RX_INVERT_LED (1 << 0) |
| 56 | #define IR_TX_INVERT_LED (1 << 1) |
| 57 | #define IR_ST (1 << 2) |
| 58 | #define IR_SF (1 << 3) |
| 59 | #define IR_SIR (1 << 4) |
| 60 | #define IR_MIR (1 << 5) |
| 61 | #define IR_FIR (1 << 6) |
| 62 | #define IR_16CRC (1 << 7) |
| 63 | #define IR_TD (1 << 8) |
| 64 | #define IR_RX_ALL (1 << 9) |
| 65 | #define IR_DMA_ENABLE (1 << 10) |
| 66 | #define IR_RX_ENABLE (1 << 11) |
| 67 | #define IR_TX_ENABLE (1 << 12) |
| 68 | #define IR_LOOPBACK (1 << 14) |
| 69 | #define IR_SIR_MODE (IR_SIR | IR_DMA_ENABLE | \ |
| 70 | IR_RX_ALL | IR_RX_ENABLE | IR_SF | \ |
| 71 | IR_16CRC) |
| 72 | |
| 73 | /* ir_status */ |
| 74 | #define IR_RX_STATUS (1 << 9) |
| 75 | #define IR_TX_STATUS (1 << 10) |
| 76 | #define IR_PHYEN (1 << 15) |
| 77 | |
| 78 | /* ir_write_phy_config */ |
| 79 | #define IR_BR(x) (((x) & 0x3f) << 10) /* baud rate */ |
| 80 | #define IR_PW(x) (((x) & 0x1f) << 5) /* pulse width */ |
| 81 | #define IR_P(x) ((x) & 0x1f) /* preamble bits */ |
| 82 | |
| 83 | /* Config2 */ |
| 84 | #define IR_MODE_INV (1 << 0) |
| 85 | #define IR_ONE_PIN (1 << 1) |
| 86 | #define IR_PHYCLK_40MHZ (0 << 2) |
| 87 | #define IR_PHYCLK_48MHZ (1 << 2) |
| 88 | #define IR_PHYCLK_56MHZ (2 << 2) |
| 89 | #define IR_PHYCLK_64MHZ (3 << 2) |
| 90 | #define IR_DP (1 << 4) |
| 91 | #define IR_DA (1 << 5) |
| 92 | #define IR_FLT_HIGH (0 << 6) |
| 93 | #define IR_FLT_MEDHI (1 << 6) |
| 94 | #define IR_FLT_MEDLO (2 << 6) |
| 95 | #define IR_FLT_LO (3 << 6) |
| 96 | #define IR_IEN (1 << 8) |
| 97 | |
| 98 | /* ir_enable */ |
| 99 | #define IR_HC (1 << 3) /* divide SBUS clock by 2 */ |
| 100 | #define IR_CE (1 << 2) /* clock enable */ |
| 101 | #define IR_C (1 << 1) /* coherency bit */ |
| 102 | #define IR_BE (1 << 0) /* set in big endian mode */ |
| 103 | |
| 104 | #define NUM_IR_DESC 64 |
| 105 | #define RING_SIZE_4 0x0 |
| 106 | #define RING_SIZE_16 0x3 |
| 107 | #define RING_SIZE_64 0xF |
| 108 | #define MAX_NUM_IR_DESC 64 |
| 109 | #define MAX_BUF_SIZE 2048 |
| 110 | |
| 111 | /* Ring descriptor flags */ |
| 112 | #define AU_OWN (1 << 7) /* tx,rx */ |
| 113 | #define IR_DIS_CRC (1 << 6) /* tx */ |
| 114 | #define IR_BAD_CRC (1 << 5) /* tx */ |
| 115 | #define IR_NEED_PULSE (1 << 4) /* tx */ |
| 116 | #define IR_FORCE_UNDER (1 << 3) /* tx */ |
| 117 | #define IR_DISABLE_TX (1 << 2) /* tx */ |
| 118 | #define IR_HW_UNDER (1 << 0) /* tx */ |
| 119 | #define IR_TX_ERROR (IR_DIS_CRC | IR_BAD_CRC | IR_HW_UNDER) |
| 120 | |
| 121 | #define IR_PHY_ERROR (1 << 6) /* rx */ |
| 122 | #define IR_CRC_ERROR (1 << 5) /* rx */ |
| 123 | #define IR_MAX_LEN (1 << 4) /* rx */ |
| 124 | #define IR_FIFO_OVER (1 << 3) /* rx */ |
| 125 | #define IR_SIR_ERROR (1 << 2) /* rx */ |
| 126 | #define IR_RX_ERROR (IR_PHY_ERROR | IR_CRC_ERROR | \ |
| 127 | IR_MAX_LEN | IR_FIFO_OVER | IR_SIR_ERROR) |
| 128 | |
| 129 | struct db_dest { |
| 130 | struct db_dest *pnext; |
| 131 | volatile u32 *vaddr; |
| 132 | dma_addr_t dma_addr; |
| 133 | }; |
| 134 | |
| 135 | struct ring_dest { |
| 136 | u8 count_0; /* 7:0 */ |
| 137 | u8 count_1; /* 12:8 */ |
| 138 | u8 reserved; |
| 139 | u8 flags; |
| 140 | u8 addr_0; /* 7:0 */ |
| 141 | u8 addr_1; /* 15:8 */ |
| 142 | u8 addr_2; /* 23:16 */ |
| 143 | u8 addr_3; /* 31:24 */ |
| 144 | }; |
| 145 | |
| 146 | /* Private data for each instance */ |
| 147 | struct au1k_private { |
| 148 | void __iomem *iobase; |
| 149 | int irq_rx, irq_tx; |
| 150 | |
| 151 | struct db_dest *pDBfree; |
| 152 | struct db_dest db[2 * NUM_IR_DESC]; |
| 153 | volatile struct ring_dest *rx_ring[NUM_IR_DESC]; |
| 154 | volatile struct ring_dest *tx_ring[NUM_IR_DESC]; |
| 155 | struct db_dest *rx_db_inuse[NUM_IR_DESC]; |
| 156 | struct db_dest *tx_db_inuse[NUM_IR_DESC]; |
| 157 | u32 rx_head; |
| 158 | u32 tx_head; |
| 159 | u32 tx_tail; |
| 160 | u32 tx_full; |
| 161 | |
| 162 | iobuff_t rx_buff; |
| 163 | |
| 164 | struct net_device *netdev; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 165 | struct qos_info qos; |
| 166 | struct irlap_cb *irlap; |
| 167 | |
| 168 | u8 open; |
| 169 | u32 speed; |
| 170 | u32 newspeed; |
| 171 | |
| 172 | struct timer_list timer; |
| 173 | |
| 174 | struct resource *ioarea; |
| 175 | struct au1k_irda_platform_data *platdata; |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 176 | struct clk *irda_clk; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 177 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | static int qos_mtt_bits = 0x07; /* 1 ms or more */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | #define RUN_AT(x) (jiffies + (x)) |
| 182 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 183 | static void au1k_irda_plat_set_phy_mode(struct au1k_private *p, int mode) |
| 184 | { |
| 185 | if (p->platdata && p->platdata->set_phy_mode) |
| 186 | p->platdata->set_phy_mode(mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 189 | static inline unsigned long irda_read(struct au1k_private *p, |
| 190 | unsigned long ofs) |
| 191 | { |
| 192 | /* |
| 193 | * IrDA peripheral bug. You have to read the register |
| 194 | * twice to get the right value. |
| 195 | */ |
| 196 | (void)__raw_readl(p->iobase + ofs); |
| 197 | return __raw_readl(p->iobase + ofs); |
| 198 | } |
| 199 | |
| 200 | static inline void irda_write(struct au1k_private *p, unsigned long ofs, |
| 201 | unsigned long val) |
| 202 | { |
| 203 | __raw_writel(val, p->iobase + ofs); |
| 204 | wmb(); |
| 205 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | /* |
| 208 | * Buffer allocation/deallocation routines. The buffer descriptor returned |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 209 | * has the virtual and dma address of a buffer suitable for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | * both, receive and transmit operations. |
| 211 | */ |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 212 | static struct db_dest *GetFreeDB(struct au1k_private *aup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | { |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 214 | struct db_dest *db; |
| 215 | db = aup->pDBfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 217 | if (db) |
| 218 | aup->pDBfree = db->pnext; |
| 219 | return db; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /* |
| 223 | DMA memory allocation, derived from pci_alloc_consistent. |
| 224 | However, the Au1000 data cache is coherent (when programmed |
| 225 | so), therefore we return KSEG0 address, not KSEG1. |
| 226 | */ |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 227 | static void *dma_alloc(size_t size, dma_addr_t *dma_handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
| 229 | void *ret; |
| 230 | int gfp = GFP_ATOMIC | GFP_DMA; |
| 231 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 232 | ret = (void *)__get_free_pages(gfp, get_order(size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | if (ret != NULL) { |
| 235 | memset(ret, 0, size); |
| 236 | *dma_handle = virt_to_bus(ret); |
| 237 | ret = (void *)KSEG0ADDR(ret); |
| 238 | } |
| 239 | return ret; |
| 240 | } |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | static void dma_free(void *vaddr, size_t size) |
| 243 | { |
| 244 | vaddr = (void *)KSEG0ADDR(vaddr); |
| 245 | free_pages((unsigned long) vaddr, get_order(size)); |
| 246 | } |
| 247 | |
| 248 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 249 | static void setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
| 251 | int i; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 252 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 253 | aup->rx_ring[i] = (volatile struct ring_dest *) |
| 254 | (rx_base + sizeof(struct ring_dest) * i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 256 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 257 | aup->tx_ring[i] = (volatile struct ring_dest *) |
| 258 | (tx_base + sizeof(struct ring_dest) * i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | } |
| 260 | } |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | static int au1k_irda_init_iobuf(iobuff_t *io, int size) |
| 263 | { |
| 264 | io->head = kmalloc(size, GFP_KERNEL); |
| 265 | if (io->head != NULL) { |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 266 | io->truesize = size; |
| 267 | io->in_frame = FALSE; |
| 268 | io->state = OUTSIDE_FRAME; |
| 269 | io->data = io->head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | return io->head ? 0 : -ENOMEM; |
| 272 | } |
| 273 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 274 | /* |
| 275 | * Set the IrDA communications speed. |
| 276 | */ |
| 277 | static int au1k_irda_set_speed(struct net_device *dev, int speed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
| 279 | struct au1k_private *aup = netdev_priv(dev); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 280 | volatile struct ring_dest *ptxd; |
| 281 | unsigned long control; |
| 282 | int ret = 0, timeout = 10, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 284 | if (speed == aup->speed) |
| 285 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 287 | /* disable PHY first */ |
| 288 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF); |
| 289 | irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 291 | /* disable RX/TX */ |
| 292 | irda_write(aup, IR_CONFIG_1, |
| 293 | irda_read(aup, IR_CONFIG_1) & ~(IR_RX_ENABLE | IR_TX_ENABLE)); |
| 294 | msleep(20); |
| 295 | while (irda_read(aup, IR_STATUS) & (IR_RX_STATUS | IR_TX_STATUS)) { |
| 296 | msleep(20); |
| 297 | if (!timeout--) { |
| 298 | printk(KERN_ERR "%s: rx/tx disable timeout\n", |
| 299 | dev->name); |
| 300 | break; |
| 301 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 304 | /* disable DMA */ |
| 305 | irda_write(aup, IR_CONFIG_1, |
| 306 | irda_read(aup, IR_CONFIG_1) & ~IR_DMA_ENABLE); |
| 307 | msleep(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 309 | /* After we disable tx/rx. the index pointers go back to zero. */ |
| 310 | aup->tx_head = aup->tx_tail = aup->rx_head = 0; |
| 311 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 312 | ptxd = aup->tx_ring[i]; |
| 313 | ptxd->flags = 0; |
| 314 | ptxd->count_0 = 0; |
| 315 | ptxd->count_1 = 0; |
| 316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 318 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 319 | ptxd = aup->rx_ring[i]; |
| 320 | ptxd->count_0 = 0; |
| 321 | ptxd->count_1 = 0; |
| 322 | ptxd->flags = AU_OWN; |
| 323 | } |
| 324 | |
| 325 | if (speed == 4000000) |
| 326 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_FIR); |
| 327 | else |
| 328 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR); |
| 329 | |
| 330 | switch (speed) { |
| 331 | case 9600: |
| 332 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(11) | IR_PW(12)); |
| 333 | irda_write(aup, IR_CONFIG_1, IR_SIR_MODE); |
| 334 | break; |
| 335 | case 19200: |
| 336 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(5) | IR_PW(12)); |
| 337 | irda_write(aup, IR_CONFIG_1, IR_SIR_MODE); |
| 338 | break; |
| 339 | case 38400: |
| 340 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(2) | IR_PW(12)); |
| 341 | irda_write(aup, IR_CONFIG_1, IR_SIR_MODE); |
| 342 | break; |
| 343 | case 57600: |
| 344 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(1) | IR_PW(12)); |
| 345 | irda_write(aup, IR_CONFIG_1, IR_SIR_MODE); |
| 346 | break; |
| 347 | case 115200: |
| 348 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_PW(12)); |
| 349 | irda_write(aup, IR_CONFIG_1, IR_SIR_MODE); |
| 350 | break; |
| 351 | case 4000000: |
| 352 | irda_write(aup, IR_WRITE_PHY_CONFIG, IR_P(15)); |
| 353 | irda_write(aup, IR_CONFIG_1, IR_FIR | IR_DMA_ENABLE | |
| 354 | IR_RX_ENABLE); |
| 355 | break; |
| 356 | default: |
| 357 | printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed); |
| 358 | ret = -EINVAL; |
| 359 | break; |
| 360 | } |
| 361 | |
| 362 | aup->speed = speed; |
| 363 | irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) | IR_PHYEN); |
| 364 | |
| 365 | control = irda_read(aup, IR_STATUS); |
| 366 | irda_write(aup, IR_RING_PROMPT, 0); |
| 367 | |
| 368 | if (control & (1 << 14)) { |
| 369 | printk(KERN_ERR "%s: configuration error\n", dev->name); |
| 370 | } else { |
| 371 | if (control & (1 << 11)) |
| 372 | printk(KERN_DEBUG "%s Valid SIR config\n", dev->name); |
| 373 | if (control & (1 << 12)) |
| 374 | printk(KERN_DEBUG "%s Valid MIR config\n", dev->name); |
| 375 | if (control & (1 << 13)) |
| 376 | printk(KERN_DEBUG "%s Valid FIR config\n", dev->name); |
| 377 | if (control & (1 << 10)) |
| 378 | printk(KERN_DEBUG "%s TX enabled\n", dev->name); |
| 379 | if (control & (1 << 9)) |
| 380 | printk(KERN_DEBUG "%s RX enabled\n", dev->name); |
| 381 | } |
| 382 | |
| 383 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 386 | static void update_rx_stats(struct net_device *dev, u32 status, u32 count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | { |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 388 | struct net_device_stats *ps = &dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 390 | ps->rx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 392 | if (status & IR_RX_ERROR) { |
| 393 | ps->rx_errors++; |
| 394 | if (status & (IR_PHY_ERROR | IR_FIFO_OVER)) |
| 395 | ps->rx_missed_errors++; |
| 396 | if (status & IR_MAX_LEN) |
| 397 | ps->rx_length_errors++; |
| 398 | if (status & IR_CRC_ERROR) |
| 399 | ps->rx_crc_errors++; |
| 400 | } else |
| 401 | ps->rx_bytes += count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 404 | static void update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 406 | struct net_device_stats *ps = &dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | ps->tx_packets++; |
| 409 | ps->tx_bytes += pkt_len; |
| 410 | |
| 411 | if (status & IR_TX_ERROR) { |
| 412 | ps->tx_errors++; |
| 413 | ps->tx_aborted_errors++; |
| 414 | } |
| 415 | } |
| 416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | static void au1k_tx_ack(struct net_device *dev) |
| 418 | { |
| 419 | struct au1k_private *aup = netdev_priv(dev); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 420 | volatile struct ring_dest *ptxd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | ptxd = aup->tx_ring[aup->tx_tail]; |
| 423 | while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) { |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 424 | update_tx_stats(dev, ptxd->flags, |
| 425 | (ptxd->count_1 << 8) | ptxd->count_0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | ptxd->count_0 = 0; |
| 427 | ptxd->count_1 = 0; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 428 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1); |
| 430 | ptxd = aup->tx_ring[aup->tx_tail]; |
| 431 | |
| 432 | if (aup->tx_full) { |
| 433 | aup->tx_full = 0; |
| 434 | netif_wake_queue(dev); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | if (aup->tx_tail == aup->tx_head) { |
| 439 | if (aup->newspeed) { |
| 440 | au1k_irda_set_speed(dev, aup->newspeed); |
| 441 | aup->newspeed = 0; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 442 | } else { |
| 443 | irda_write(aup, IR_CONFIG_1, |
| 444 | irda_read(aup, IR_CONFIG_1) & ~IR_TX_ENABLE); |
| 445 | irda_write(aup, IR_CONFIG_1, |
| 446 | irda_read(aup, IR_CONFIG_1) | IR_RX_ENABLE); |
| 447 | irda_write(aup, IR_RING_PROMPT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | } |
| 450 | } |
| 451 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 452 | static int au1k_irda_rx(struct net_device *dev) |
| 453 | { |
| 454 | struct au1k_private *aup = netdev_priv(dev); |
| 455 | volatile struct ring_dest *prxd; |
| 456 | struct sk_buff *skb; |
| 457 | struct db_dest *pDB; |
| 458 | u32 flags, count; |
| 459 | |
| 460 | prxd = aup->rx_ring[aup->rx_head]; |
| 461 | flags = prxd->flags; |
| 462 | |
| 463 | while (!(flags & AU_OWN)) { |
| 464 | pDB = aup->rx_db_inuse[aup->rx_head]; |
| 465 | count = (prxd->count_1 << 8) | prxd->count_0; |
| 466 | if (!(flags & IR_RX_ERROR)) { |
| 467 | /* good frame */ |
| 468 | update_rx_stats(dev, flags, count); |
| 469 | skb = alloc_skb(count + 1, GFP_ATOMIC); |
| 470 | if (skb == NULL) { |
| 471 | dev->stats.rx_dropped++; |
| 472 | continue; |
| 473 | } |
| 474 | skb_reserve(skb, 1); |
| 475 | if (aup->speed == 4000000) |
| 476 | skb_put(skb, count); |
| 477 | else |
| 478 | skb_put(skb, count - 2); |
| 479 | skb_copy_to_linear_data(skb, (void *)pDB->vaddr, |
| 480 | count - 2); |
| 481 | skb->dev = dev; |
| 482 | skb_reset_mac_header(skb); |
| 483 | skb->protocol = htons(ETH_P_IRDA); |
| 484 | netif_rx(skb); |
| 485 | prxd->count_0 = 0; |
| 486 | prxd->count_1 = 0; |
| 487 | } |
| 488 | prxd->flags |= AU_OWN; |
| 489 | aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1); |
| 490 | irda_write(aup, IR_RING_PROMPT, 0); |
| 491 | |
| 492 | /* next descriptor */ |
| 493 | prxd = aup->rx_ring[aup->rx_head]; |
| 494 | flags = prxd->flags; |
| 495 | |
| 496 | } |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | static irqreturn_t au1k_irda_interrupt(int dummy, void *dev_id) |
| 501 | { |
| 502 | struct net_device *dev = dev_id; |
| 503 | struct au1k_private *aup = netdev_priv(dev); |
| 504 | |
| 505 | irda_write(aup, IR_INT_CLEAR, 0); /* ack irda interrupts */ |
| 506 | |
| 507 | au1k_irda_rx(dev); |
| 508 | au1k_tx_ack(dev); |
| 509 | |
| 510 | return IRQ_HANDLED; |
| 511 | } |
| 512 | |
| 513 | static int au1k_init(struct net_device *dev) |
| 514 | { |
| 515 | struct au1k_private *aup = netdev_priv(dev); |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 516 | u32 enable, ring_address, phyck; |
| 517 | struct clk *c; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 518 | int i; |
| 519 | |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 520 | c = clk_get(NULL, "irda_clk"); |
| 521 | if (IS_ERR(c)) |
| 522 | return PTR_ERR(c); |
| 523 | i = clk_prepare_enable(c); |
| 524 | if (i) { |
| 525 | clk_put(c); |
| 526 | return i; |
| 527 | } |
| 528 | |
| 529 | switch (clk_get_rate(c)) { |
| 530 | case 40000000: |
| 531 | phyck = IR_PHYCLK_40MHZ; |
| 532 | break; |
| 533 | case 48000000: |
| 534 | phyck = IR_PHYCLK_48MHZ; |
| 535 | break; |
| 536 | case 56000000: |
| 537 | phyck = IR_PHYCLK_56MHZ; |
| 538 | break; |
| 539 | case 64000000: |
| 540 | phyck = IR_PHYCLK_64MHZ; |
| 541 | break; |
| 542 | default: |
| 543 | clk_disable_unprepare(c); |
| 544 | clk_put(c); |
| 545 | return -EINVAL; |
| 546 | } |
| 547 | aup->irda_clk = c; |
| 548 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 549 | enable = IR_HC | IR_CE | IR_C; |
| 550 | #ifndef CONFIG_CPU_LITTLE_ENDIAN |
| 551 | enable |= IR_BE; |
| 552 | #endif |
| 553 | aup->tx_head = 0; |
| 554 | aup->tx_tail = 0; |
| 555 | aup->rx_head = 0; |
| 556 | |
| 557 | for (i = 0; i < NUM_IR_DESC; i++) |
| 558 | aup->rx_ring[i]->flags = AU_OWN; |
| 559 | |
| 560 | irda_write(aup, IR_ENABLE, enable); |
| 561 | msleep(20); |
| 562 | |
| 563 | /* disable PHY */ |
| 564 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF); |
| 565 | irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN); |
| 566 | msleep(20); |
| 567 | |
| 568 | irda_write(aup, IR_MAX_PKT_LEN, MAX_BUF_SIZE); |
| 569 | |
| 570 | ring_address = (u32)virt_to_phys((void *)aup->rx_ring[0]); |
| 571 | irda_write(aup, IR_RING_BASE_ADDR_H, ring_address >> 26); |
| 572 | irda_write(aup, IR_RING_BASE_ADDR_L, (ring_address >> 10) & 0xffff); |
| 573 | |
| 574 | irda_write(aup, IR_RING_SIZE, |
| 575 | (RING_SIZE_64 << 8) | (RING_SIZE_64 << 12)); |
| 576 | |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 577 | irda_write(aup, IR_CONFIG_2, phyck | IR_ONE_PIN); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 578 | irda_write(aup, IR_RING_ADDR_CMPR, 0); |
| 579 | |
| 580 | au1k_irda_set_speed(dev, 9600); |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static int au1k_irda_start(struct net_device *dev) |
| 585 | { |
| 586 | struct au1k_private *aup = netdev_priv(dev); |
| 587 | char hwname[32]; |
| 588 | int retval; |
| 589 | |
| 590 | retval = au1k_init(dev); |
| 591 | if (retval) { |
| 592 | printk(KERN_ERR "%s: error in au1k_init\n", dev->name); |
| 593 | return retval; |
| 594 | } |
| 595 | |
| 596 | retval = request_irq(aup->irq_tx, &au1k_irda_interrupt, 0, |
| 597 | dev->name, dev); |
| 598 | if (retval) { |
| 599 | printk(KERN_ERR "%s: unable to get IRQ %d\n", |
| 600 | dev->name, dev->irq); |
| 601 | return retval; |
| 602 | } |
| 603 | retval = request_irq(aup->irq_rx, &au1k_irda_interrupt, 0, |
| 604 | dev->name, dev); |
| 605 | if (retval) { |
| 606 | free_irq(aup->irq_tx, dev); |
| 607 | printk(KERN_ERR "%s: unable to get IRQ %d\n", |
| 608 | dev->name, dev->irq); |
| 609 | return retval; |
| 610 | } |
| 611 | |
| 612 | /* Give self a hardware name */ |
| 613 | sprintf(hwname, "Au1000 SIR/FIR"); |
| 614 | aup->irlap = irlap_open(dev, &aup->qos, hwname); |
| 615 | netif_start_queue(dev); |
| 616 | |
| 617 | /* int enable */ |
| 618 | irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) | IR_IEN); |
| 619 | |
| 620 | /* power up */ |
| 621 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR); |
| 622 | |
| 623 | aup->timer.expires = RUN_AT((3 * HZ)); |
| 624 | aup->timer.data = (unsigned long)dev; |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | static int au1k_irda_stop(struct net_device *dev) |
| 629 | { |
| 630 | struct au1k_private *aup = netdev_priv(dev); |
| 631 | |
| 632 | au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF); |
| 633 | |
| 634 | /* disable interrupts */ |
| 635 | irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) & ~IR_IEN); |
| 636 | irda_write(aup, IR_CONFIG_1, 0); |
| 637 | irda_write(aup, IR_ENABLE, 0); /* disable clock */ |
| 638 | |
| 639 | if (aup->irlap) { |
| 640 | irlap_close(aup->irlap); |
| 641 | aup->irlap = NULL; |
| 642 | } |
| 643 | |
| 644 | netif_stop_queue(dev); |
| 645 | del_timer(&aup->timer); |
| 646 | |
| 647 | /* disable the interrupt */ |
| 648 | free_irq(aup->irq_tx, dev); |
| 649 | free_irq(aup->irq_rx, dev); |
| 650 | |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 651 | clk_disable_unprepare(aup->irda_clk); |
| 652 | clk_put(aup->irda_clk); |
| 653 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 654 | return 0; |
| 655 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | /* |
| 658 | * Au1000 transmit routine. |
| 659 | */ |
| 660 | static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) |
| 661 | { |
| 662 | struct au1k_private *aup = netdev_priv(dev); |
| 663 | int speed = irda_get_next_speed(skb); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 664 | volatile struct ring_dest *ptxd; |
| 665 | struct db_dest *pDB; |
| 666 | u32 len, flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 668 | if (speed != aup->speed && speed != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | aup->newspeed = speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | if ((skb->len == 0) && (aup->newspeed)) { |
| 672 | if (aup->tx_tail == aup->tx_head) { |
| 673 | au1k_irda_set_speed(dev, speed); |
| 674 | aup->newspeed = 0; |
| 675 | } |
| 676 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 677 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | ptxd = aup->tx_ring[aup->tx_head]; |
| 681 | flags = ptxd->flags; |
| 682 | |
| 683 | if (flags & AU_OWN) { |
| 684 | printk(KERN_DEBUG "%s: tx_full\n", dev->name); |
| 685 | netif_stop_queue(dev); |
| 686 | aup->tx_full = 1; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 687 | return 1; |
| 688 | } else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | printk(KERN_DEBUG "%s: tx_full\n", dev->name); |
| 690 | netif_stop_queue(dev); |
| 691 | aup->tx_full = 1; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 692 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
| 694 | |
| 695 | pDB = aup->tx_db_inuse[aup->tx_head]; |
| 696 | |
| 697 | #if 0 |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 698 | if (irda_read(aup, IR_RX_BYTE_CNT) != 0) { |
| 699 | printk(KERN_DEBUG "tx warning: rx byte cnt %x\n", |
| 700 | irda_read(aup, IR_RX_BYTE_CNT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | #endif |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | if (aup->speed == 4000000) { |
| 705 | /* FIR */ |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 706 | skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | ptxd->count_0 = skb->len & 0xff; |
| 708 | ptxd->count_1 = (skb->len >> 8) & 0xff; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 709 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | /* SIR */ |
| 711 | len = async_wrap_skb(skb, (u8 *)pDB->vaddr, MAX_BUF_SIZE); |
| 712 | ptxd->count_0 = len & 0xff; |
| 713 | ptxd->count_1 = (len >> 8) & 0xff; |
| 714 | ptxd->flags |= IR_DIS_CRC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | } |
| 716 | ptxd->flags |= AU_OWN; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 717 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 719 | irda_write(aup, IR_CONFIG_1, |
| 720 | irda_read(aup, IR_CONFIG_1) | IR_TX_ENABLE); |
| 721 | irda_write(aup, IR_RING_PROMPT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
| 723 | dev_kfree_skb(skb); |
| 724 | aup->tx_head = (aup->tx_head + 1) & (NUM_IR_DESC - 1); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 725 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
| 727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | /* |
| 729 | * The Tx ring has been full longer than the watchdog timeout |
| 730 | * value. The transmitter must be hung? |
| 731 | */ |
| 732 | static void au1k_tx_timeout(struct net_device *dev) |
| 733 | { |
| 734 | u32 speed; |
| 735 | struct au1k_private *aup = netdev_priv(dev); |
| 736 | |
| 737 | printk(KERN_ERR "%s: tx timeout\n", dev->name); |
| 738 | speed = aup->speed; |
| 739 | aup->speed = 0; |
| 740 | au1k_irda_set_speed(dev, speed); |
| 741 | aup->tx_full = 0; |
| 742 | netif_wake_queue(dev); |
| 743 | } |
| 744 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 745 | static int au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | { |
| 747 | struct if_irda_req *rq = (struct if_irda_req *)ifreq; |
| 748 | struct au1k_private *aup = netdev_priv(dev); |
| 749 | int ret = -EOPNOTSUPP; |
| 750 | |
| 751 | switch (cmd) { |
| 752 | case SIOCSBANDWIDTH: |
| 753 | if (capable(CAP_NET_ADMIN)) { |
| 754 | /* |
| 755 | * We are unable to set the speed if the |
| 756 | * device is not running. |
| 757 | */ |
| 758 | if (aup->open) |
| 759 | ret = au1k_irda_set_speed(dev, |
| 760 | rq->ifr_baudrate); |
| 761 | else { |
| 762 | printk(KERN_ERR "%s ioctl: !netif_running\n", |
| 763 | dev->name); |
| 764 | ret = 0; |
| 765 | } |
| 766 | } |
| 767 | break; |
| 768 | |
| 769 | case SIOCSMEDIABUSY: |
| 770 | ret = -EPERM; |
| 771 | if (capable(CAP_NET_ADMIN)) { |
| 772 | irda_device_set_media_busy(dev, TRUE); |
| 773 | ret = 0; |
| 774 | } |
| 775 | break; |
| 776 | |
| 777 | case SIOCGRECEIVING: |
| 778 | rq->ifr_receiving = 0; |
| 779 | break; |
| 780 | default: |
| 781 | break; |
| 782 | } |
| 783 | return ret; |
| 784 | } |
| 785 | |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 786 | static const struct net_device_ops au1k_irda_netdev_ops = { |
| 787 | .ndo_open = au1k_irda_start, |
| 788 | .ndo_stop = au1k_irda_stop, |
| 789 | .ndo_start_xmit = au1k_irda_hard_xmit, |
| 790 | .ndo_tx_timeout = au1k_tx_timeout, |
| 791 | .ndo_do_ioctl = au1k_irda_ioctl, |
| 792 | }; |
| 793 | |
Bill Pemberton | 45ac936 | 2012-12-03 09:24:13 -0500 | [diff] [blame] | 794 | static int au1k_irda_net_init(struct net_device *dev) |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 795 | { |
| 796 | struct au1k_private *aup = netdev_priv(dev); |
| 797 | struct db_dest *pDB, *pDBfree; |
| 798 | int i, err, retval = 0; |
| 799 | dma_addr_t temp; |
| 800 | |
| 801 | err = au1k_irda_init_iobuf(&aup->rx_buff, 14384); |
| 802 | if (err) |
| 803 | goto out1; |
| 804 | |
| 805 | dev->netdev_ops = &au1k_irda_netdev_ops; |
| 806 | |
| 807 | irda_init_max_qos_capabilies(&aup->qos); |
| 808 | |
| 809 | /* The only value we must override it the baudrate */ |
| 810 | aup->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 | |
| 811 | IR_57600 | IR_115200 | IR_576000 | (IR_4000000 << 8); |
| 812 | |
| 813 | aup->qos.min_turn_time.bits = qos_mtt_bits; |
| 814 | irda_qos_bits_to_value(&aup->qos); |
| 815 | |
| 816 | retval = -ENOMEM; |
| 817 | |
| 818 | /* Tx ring follows rx ring + 512 bytes */ |
| 819 | /* we need a 1k aligned buffer */ |
| 820 | aup->rx_ring[0] = (struct ring_dest *) |
| 821 | dma_alloc(2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)), |
| 822 | &temp); |
| 823 | if (!aup->rx_ring[0]) |
| 824 | goto out2; |
| 825 | |
| 826 | /* allocate the data buffers */ |
| 827 | aup->db[0].vaddr = |
Joe Perches | c2fd03a | 2012-06-04 12:44:18 +0000 | [diff] [blame] | 828 | dma_alloc(MAX_BUF_SIZE * 2 * NUM_IR_DESC, &temp); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 829 | if (!aup->db[0].vaddr) |
| 830 | goto out3; |
| 831 | |
| 832 | setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512); |
| 833 | |
| 834 | pDBfree = NULL; |
| 835 | pDB = aup->db; |
| 836 | for (i = 0; i < (2 * NUM_IR_DESC); i++) { |
| 837 | pDB->pnext = pDBfree; |
| 838 | pDBfree = pDB; |
| 839 | pDB->vaddr = |
| 840 | (u32 *)((unsigned)aup->db[0].vaddr + (MAX_BUF_SIZE * i)); |
| 841 | pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr); |
| 842 | pDB++; |
| 843 | } |
| 844 | aup->pDBfree = pDBfree; |
| 845 | |
| 846 | /* attach a data buffer to each descriptor */ |
| 847 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 848 | pDB = GetFreeDB(aup); |
| 849 | if (!pDB) |
| 850 | goto out3; |
| 851 | aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff); |
| 852 | aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff); |
| 853 | aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff); |
| 854 | aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff); |
| 855 | aup->rx_db_inuse[i] = pDB; |
| 856 | } |
| 857 | for (i = 0; i < NUM_IR_DESC; i++) { |
| 858 | pDB = GetFreeDB(aup); |
| 859 | if (!pDB) |
| 860 | goto out3; |
| 861 | aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff); |
| 862 | aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff); |
| 863 | aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff); |
| 864 | aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff); |
| 865 | aup->tx_ring[i]->count_0 = 0; |
| 866 | aup->tx_ring[i]->count_1 = 0; |
| 867 | aup->tx_ring[i]->flags = 0; |
| 868 | aup->tx_db_inuse[i] = pDB; |
| 869 | } |
| 870 | |
| 871 | return 0; |
| 872 | |
| 873 | out3: |
| 874 | dma_free((void *)aup->rx_ring[0], |
| 875 | 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest))); |
| 876 | out2: |
| 877 | kfree(aup->rx_buff.head); |
| 878 | out1: |
| 879 | printk(KERN_ERR "au1k_irda_net_init() failed. Returns %d\n", retval); |
| 880 | return retval; |
| 881 | } |
| 882 | |
Bill Pemberton | 45ac936 | 2012-12-03 09:24:13 -0500 | [diff] [blame] | 883 | static int au1k_irda_probe(struct platform_device *pdev) |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 884 | { |
| 885 | struct au1k_private *aup; |
| 886 | struct net_device *dev; |
| 887 | struct resource *r; |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 888 | struct clk *c; |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 889 | int err; |
| 890 | |
| 891 | dev = alloc_irdadev(sizeof(struct au1k_private)); |
| 892 | if (!dev) |
| 893 | return -ENOMEM; |
| 894 | |
| 895 | aup = netdev_priv(dev); |
| 896 | |
| 897 | aup->platdata = pdev->dev.platform_data; |
| 898 | |
| 899 | err = -EINVAL; |
| 900 | r = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 901 | if (!r) |
| 902 | goto out; |
| 903 | |
| 904 | aup->irq_tx = r->start; |
| 905 | |
| 906 | r = platform_get_resource(pdev, IORESOURCE_IRQ, 1); |
| 907 | if (!r) |
| 908 | goto out; |
| 909 | |
| 910 | aup->irq_rx = r->start; |
| 911 | |
| 912 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 913 | if (!r) |
| 914 | goto out; |
| 915 | |
| 916 | err = -EBUSY; |
Silviu-Mihai Popescu | 94d8f2b1 | 2013-03-16 21:03:46 +0000 | [diff] [blame] | 917 | aup->ioarea = request_mem_region(r->start, resource_size(r), |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 918 | pdev->name); |
| 919 | if (!aup->ioarea) |
| 920 | goto out; |
| 921 | |
Manuel Lauss | 9178af9 | 2014-07-23 16:36:53 +0200 | [diff] [blame] | 922 | /* bail out early if clock doesn't exist */ |
| 923 | c = clk_get(NULL, "irda_clk"); |
| 924 | if (IS_ERR(c)) { |
| 925 | err = PTR_ERR(c); |
| 926 | goto out; |
| 927 | } |
| 928 | clk_put(c); |
| 929 | |
Silviu-Mihai Popescu | 94d8f2b1 | 2013-03-16 21:03:46 +0000 | [diff] [blame] | 930 | aup->iobase = ioremap_nocache(r->start, resource_size(r)); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 931 | if (!aup->iobase) |
| 932 | goto out2; |
| 933 | |
| 934 | dev->irq = aup->irq_rx; |
| 935 | |
| 936 | err = au1k_irda_net_init(dev); |
| 937 | if (err) |
| 938 | goto out3; |
| 939 | err = register_netdev(dev); |
| 940 | if (err) |
| 941 | goto out4; |
| 942 | |
| 943 | platform_set_drvdata(pdev, dev); |
| 944 | |
| 945 | printk(KERN_INFO "IrDA: Registered device %s\n", dev->name); |
| 946 | return 0; |
| 947 | |
| 948 | out4: |
| 949 | dma_free((void *)aup->db[0].vaddr, |
| 950 | MAX_BUF_SIZE * 2 * NUM_IR_DESC); |
| 951 | dma_free((void *)aup->rx_ring[0], |
| 952 | 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest))); |
| 953 | kfree(aup->rx_buff.head); |
| 954 | out3: |
| 955 | iounmap(aup->iobase); |
| 956 | out2: |
| 957 | release_resource(aup->ioarea); |
| 958 | kfree(aup->ioarea); |
| 959 | out: |
| 960 | free_netdev(dev); |
| 961 | return err; |
| 962 | } |
| 963 | |
Bill Pemberton | 45ac936 | 2012-12-03 09:24:13 -0500 | [diff] [blame] | 964 | static int au1k_irda_remove(struct platform_device *pdev) |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 965 | { |
| 966 | struct net_device *dev = platform_get_drvdata(pdev); |
| 967 | struct au1k_private *aup = netdev_priv(dev); |
| 968 | |
| 969 | unregister_netdev(dev); |
| 970 | |
| 971 | dma_free((void *)aup->db[0].vaddr, |
| 972 | MAX_BUF_SIZE * 2 * NUM_IR_DESC); |
| 973 | dma_free((void *)aup->rx_ring[0], |
| 974 | 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest))); |
| 975 | kfree(aup->rx_buff.head); |
| 976 | |
| 977 | iounmap(aup->iobase); |
| 978 | release_resource(aup->ioarea); |
| 979 | kfree(aup->ioarea); |
| 980 | |
| 981 | free_netdev(dev); |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | static struct platform_driver au1k_irda_driver = { |
| 987 | .driver = { |
| 988 | .name = "au1000-irda", |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 989 | }, |
| 990 | .probe = au1k_irda_probe, |
Bill Pemberton | 45ac936 | 2012-12-03 09:24:13 -0500 | [diff] [blame] | 991 | .remove = au1k_irda_remove, |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 992 | }; |
| 993 | |
Sachin Kamat | 95d158d | 2013-03-20 01:41:30 +0000 | [diff] [blame] | 994 | module_platform_driver(au1k_irda_driver); |
Manuel Lauss | cd671c1 | 2011-12-08 10:42:15 +0000 | [diff] [blame] | 995 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>"); |
| 997 | MODULE_DESCRIPTION("Au1000 IrDA Device Driver"); |