[11] | 1 | /* |
---|
| 2 | * 2nd - OMAP "second stage" Flash Loader |
---|
| 3 | * |
---|
| 4 | * Copyright (C) 2008 Guillaume Bougard <gbougard@pkg.fr> |
---|
| 5 | * Copyright (C) 2005 Luis Recuerda <lrec@helios.homeip.net> |
---|
| 6 | * |
---|
| 7 | * This program is free software; you can redistribute it and/or |
---|
| 8 | * modify it under the terms of the GNU General Public License |
---|
| 9 | * as published by the Free Software Foundation; either version 2 |
---|
| 10 | * of the License, or (at your option) any later version. |
---|
| 11 | * |
---|
| 12 | * This program is distributed in the hope that it will be useful, |
---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 15 | * GNU General Public License for more details. |
---|
| 16 | * |
---|
| 17 | * You should have received a copy of the GNU General Public License |
---|
| 18 | * along with this program; if not, write to the Free Software |
---|
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
---|
| 20 | * |
---|
| 21 | */ |
---|
| 22 | |
---|
| 23 | #include "types.h" |
---|
| 24 | #include "usb.h" |
---|
| 25 | |
---|
| 26 | #define USBS_OFFSET 0xfffb4000 |
---|
| 27 | #define REG8(addr) (*(volatile u8 *) (addr)) |
---|
| 28 | #define REG16(addr) (*(volatile u16 *) (addr)) |
---|
| 29 | #define REG32(addr) (*(volatile u32 *) (addr)) |
---|
| 30 | #define UREG(addr) REG16 (USBS_OFFSET + (addr)) |
---|
| 31 | #define UREG8(addr) REG8 (USBS_OFFSET + (addr)) |
---|
| 32 | |
---|
| 33 | #define CLOCK_CTRL_REG REG16 (0xfffe0830) |
---|
| 34 | #define FUNC_MUX_CTRL_D REG32 (0xfffe1038) |
---|
| 35 | |
---|
| 36 | #define USBS_REV UREG (0x00) |
---|
| 37 | #define USBS_EP_NUM UREG (0x04) |
---|
| 38 | #define USBS_DATA UREG (0x08) |
---|
| 39 | #define USBS_DATA8 UREG8 (0x08) |
---|
| 40 | #define USBS_CTRL UREG (0x0c) |
---|
| 41 | #define USBS_STAT_FLG UREG (0x10) |
---|
| 42 | #define USBS_RXFSTAT UREG (0x14) |
---|
| 43 | #define USBS_SYSCON1 UREG (0x18) |
---|
| 44 | #define USBS_SYSCON2 UREG (0x1c) |
---|
| 45 | #define USBS_DEVSTAT UREG (0x20) |
---|
| 46 | #define USBS_SOF UREG (0x24) |
---|
| 47 | #define USBS_IRQ_EN UREG (0x28) |
---|
| 48 | #define USBS_DMA_IRQ_EN UREG (0x2c) |
---|
| 49 | #define USBS_IRQ_SRC UREG (0x30) |
---|
| 50 | #define USBS_EPN_STAT UREG (0x34) |
---|
| 51 | #define USBS_DMAN_STAT UREG (0x38) |
---|
| 52 | #define USBS_RXDMA_CFG UREG (0x40) |
---|
| 53 | #define USBS_TXDMA_CFG UREG (0x44) |
---|
| 54 | #define USBS_DATA_DMA UREG (0x48) |
---|
| 55 | #define USBS_TXDMA0 UREG (0x50) |
---|
| 56 | #define USBS_TXDMA1 UREG (0x54) |
---|
| 57 | #define USBS_TXDMA2 UREG (0x58) |
---|
| 58 | #define USBS_RXDMA0 UREG (0x60) |
---|
| 59 | #define USBS_RXDMA1 UREG (0x64) |
---|
| 60 | #define USBS_RXDMA2 UREG (0x68) |
---|
| 61 | #define USBS_EP0 UREG (0x80) |
---|
| 62 | #define USBS_EP_RX(ep) UREG (0x80+((ep)<<2)) |
---|
| 63 | #define USBS_EP_TX(ep) UREG (0xc0+((ep)<<2)) |
---|
| 64 | |
---|
| 65 | #define _SETUP_SEL 0x40 |
---|
| 66 | #define _EP_SEL 0x20 |
---|
| 67 | #define _EP_SEL_IN 0x10 |
---|
| 68 | #define _EP_SEL_OUT 0x00 |
---|
| 69 | |
---|
| 70 | static u16 old_sel= 0; |
---|
| 71 | static void inline select (u16 sel) |
---|
| 72 | { |
---|
| 73 | if (old_sel) |
---|
| 74 | USBS_EP_NUM= old_sel & ~(_SETUP_SEL | _EP_SEL); |
---|
| 75 | USBS_EP_NUM= old_sel= sel; |
---|
| 76 | } |
---|
| 77 | static void inline unselect (void) |
---|
| 78 | { |
---|
| 79 | if (old_sel) |
---|
| 80 | USBS_EP_NUM= old_sel & ~(_SETUP_SEL | _EP_SEL); |
---|
| 81 | old_sel= 0; |
---|
| 82 | } |
---|
| 83 | |
---|
| 84 | #define SELECT(info) select (_EP_SEL | (info)->select) |
---|
| 85 | #define SELECT_RX(ep) select (_EP_SEL | _EP_SEL_OUT | (ep)) |
---|
| 86 | #define SELECT_TX(ep) select (_EP_SEL | _EP_SEL_IN | (ep)) |
---|
| 87 | #define SELECT_SETUP() select (_SETUP_SEL) |
---|
| 88 | #define UNSELECT(info) unselect () |
---|
| 89 | #define UNSELECT_RX(ep) unselect () |
---|
| 90 | #define UNSELECT_TX(ep) unselect () |
---|
| 91 | #define UNSELECT_SETUP() unselect () |
---|
| 92 | |
---|
| 93 | |
---|
| 94 | // CTRL: |
---|
| 95 | #define _CLR_HALT 0x80 |
---|
| 96 | #define _SET_HALT 0x40 |
---|
| 97 | #define _SET_FIFO_EN 0x04 |
---|
| 98 | #define _CLR_EP 0x02 |
---|
| 99 | #define _RESET_EP 0x01 |
---|
| 100 | #define STALL_EPn_RX(ep) do { SELECT_RX (ep); USBS_CTRL= _SET_HALT; UNSELECT_RX (ep); } while (0) |
---|
| 101 | #define STALL_EPn_TX(ep) do { SELECT_TX (ep); USBS_CTRL= _SET_HALT; UNSELECT_TX (ep); } while (0) |
---|
| 102 | |
---|
| 103 | // STAT_FLG: |
---|
| 104 | #define _STALL 0x20 |
---|
| 105 | #define _NAK 0x10 |
---|
| 106 | #define _ACK 0x08 |
---|
| 107 | #define _FIFO_EN 0x04 |
---|
| 108 | #define _NI_FIFO_EMPTY 0x02 |
---|
| 109 | #define _NI_FIFO_FULL 0x01 |
---|
| 110 | |
---|
| 111 | // SYSCON1: |
---|
| 112 | #define _CFG_LOCK 0x0100 |
---|
| 113 | #define _NAK_EN 0x0010 |
---|
| 114 | #define _AUTODEC_DIS 0x0008 |
---|
| 115 | #define _SELF_PWR 0x0004 |
---|
| 116 | #define _SOFF_DIS 0x0002 |
---|
| 117 | #define _PULLUP_EN 0x0001 |
---|
| 118 | |
---|
| 119 | // SYSCON2: |
---|
| 120 | #define _STALL_CMD 0x20 |
---|
| 121 | #define _DEV_CFG 0x08 |
---|
| 122 | #define _CLR_CFG 0x04 |
---|
| 123 | #define STALL_EP0() USBS_SYSCON2= _STALL_CMD |
---|
| 124 | |
---|
| 125 | // DEVSTAT: |
---|
| 126 | #define _DS_USB_Reset 0x20 |
---|
| 127 | #define _DS_SUS 0x10 |
---|
| 128 | #define _DS_CFG 0x08 |
---|
| 129 | #define _DS_ADD 0x04 |
---|
| 130 | #define _DS_DEF 0x02 |
---|
| 131 | #define _DS_ATT 0x01 |
---|
| 132 | |
---|
| 133 | // IRQ_EN: |
---|
| 134 | #define _SOF_IE 0x80 |
---|
| 135 | #define _EPn_RX_IE 0x20 |
---|
| 136 | #define _EPn_TX_IE 0x10 |
---|
| 137 | #define _DS_CHG_IE 0x08 |
---|
| 138 | #define _EP0_IE 0x01 |
---|
| 139 | |
---|
| 140 | // IRQ_SRC: |
---|
| 141 | #define _IRQ_TXn_DONE (1<<10) |
---|
| 142 | #define _IRQ_RXn_CNT (1<<9) |
---|
| 143 | #define _IRQ_RXn_EOT (1<<8) |
---|
| 144 | #define _IRQ_SOF (1<<7) |
---|
| 145 | #define _IRQ_EPn_RX (1<<5) |
---|
| 146 | #define _IRQ_EPn_TX (1<<4) |
---|
| 147 | #define _IRQ_DS_CHG (1<<3) |
---|
| 148 | #define _IRQ_SETUP (1<<2) |
---|
| 149 | #define _IRQ_EP0_RX (1<<1) |
---|
| 150 | #define _IRQ_EP0_TX (1<<0) |
---|
| 151 | |
---|
| 152 | //////////////////// |
---|
| 153 | |
---|
| 154 | static const u8 *tx_buffer= 0; |
---|
| 155 | static int tx_size= 0; |
---|
| 156 | static int tx_complete= 0; |
---|
| 157 | |
---|
| 158 | static void write_fifo (void) |
---|
| 159 | { |
---|
| 160 | while (tx_size > 0 && (USBS_STAT_FLG & _NI_FIFO_FULL) == 0) |
---|
| 161 | { |
---|
| 162 | USBS_DATA8= *tx_buffer++; |
---|
| 163 | --tx_size; |
---|
| 164 | } |
---|
| 165 | |
---|
| 166 | tx_complete= tx_size == 0 && (USBS_STAT_FLG & _NI_FIFO_FULL) == 0; |
---|
| 167 | USBS_CTRL= _SET_FIFO_EN; |
---|
| 168 | } |
---|
| 169 | |
---|
| 170 | void usb_send (const void *buffer, int size) |
---|
| 171 | { |
---|
| 172 | tx_buffer= buffer; |
---|
| 173 | tx_size= size; |
---|
| 174 | tx_complete= 0; |
---|
| 175 | |
---|
| 176 | SELECT_TX (1); |
---|
| 177 | write_fifo (); |
---|
| 178 | UNSELECT_TX (1); |
---|
| 179 | } |
---|
| 180 | |
---|
| 181 | int usb_sent (void) |
---|
| 182 | { |
---|
| 183 | int result= 0; |
---|
| 184 | |
---|
| 185 | if (USBS_IRQ_SRC & _IRQ_EPn_TX) |
---|
| 186 | { |
---|
| 187 | int epnum= USBS_EPN_STAT & 0x000f; |
---|
| 188 | USBS_IRQ_SRC= _IRQ_EPn_TX; |
---|
| 189 | |
---|
| 190 | if (epnum == 1) |
---|
| 191 | { |
---|
| 192 | SELECT_TX (1); |
---|
| 193 | |
---|
| 194 | if (USBS_STAT_FLG & _ACK) |
---|
| 195 | { |
---|
| 196 | if (tx_complete) |
---|
| 197 | result= 1; |
---|
| 198 | else |
---|
| 199 | write_fifo (); |
---|
| 200 | } |
---|
| 201 | UNSELECT_TX (1); |
---|
| 202 | } |
---|
| 203 | } |
---|
| 204 | |
---|
| 205 | return result; |
---|
| 206 | } |
---|
| 207 | |
---|
| 208 | //////////////////// |
---|
| 209 | |
---|
| 210 | static u8 *rx_buffer= NULL; |
---|
| 211 | static u8 *rx_buffer0= NULL; |
---|
| 212 | static int rx_complete= 0; |
---|
| 213 | static int rx_size= 0; |
---|
| 214 | |
---|
| 215 | static void read_fifo (void) |
---|
| 216 | { |
---|
| 217 | rx_complete= (USBS_STAT_FLG & _NI_FIFO_FULL) == 0; |
---|
| 218 | |
---|
| 219 | while ((USBS_STAT_FLG & _NI_FIFO_EMPTY) == 0 && rx_size-- > 0) |
---|
| 220 | *rx_buffer++= USBS_DATA8; |
---|
| 221 | } |
---|
| 222 | |
---|
| 223 | void usb_recv (void *buffer, int size) |
---|
| 224 | { |
---|
| 225 | rx_buffer0= rx_buffer= buffer; |
---|
| 226 | rx_size= size; |
---|
| 227 | |
---|
| 228 | //static int in_rx= 0; |
---|
| 229 | //if (!in_rx) { in_rx= 1; |
---|
| 230 | SELECT_RX (2); |
---|
| 231 | USBS_CTRL= _SET_FIFO_EN; |
---|
| 232 | UNSELECT_RX (2); |
---|
| 233 | //} |
---|
| 234 | } |
---|
| 235 | |
---|
| 236 | int usb_rcvd (void) |
---|
| 237 | { |
---|
| 238 | int result= 0; |
---|
| 239 | |
---|
| 240 | if (USBS_IRQ_SRC & _IRQ_EPn_RX) |
---|
| 241 | { |
---|
| 242 | int epnum= (USBS_EPN_STAT & 0x0f00) >> 8; |
---|
| 243 | USBS_IRQ_SRC= _IRQ_EPn_RX; |
---|
| 244 | |
---|
| 245 | if (epnum == 2) |
---|
| 246 | { |
---|
| 247 | SELECT_RX (2); |
---|
| 248 | |
---|
| 249 | if (USBS_STAT_FLG & _ACK) |
---|
| 250 | { |
---|
| 251 | read_fifo (); |
---|
| 252 | if (rx_complete || rx_size == 0) |
---|
| 253 | result= rx_buffer - rx_buffer0; |
---|
| 254 | else |
---|
| 255 | USBS_CTRL= _SET_FIFO_EN; |
---|
| 256 | } |
---|
| 257 | UNSELECT_RX (2); |
---|
| 258 | } |
---|
| 259 | } |
---|
| 260 | |
---|
| 261 | return result; |
---|
| 262 | } |
---|