Insop Song | e7185c69 | 2014-01-20 23:47:06 -0800 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License as published by |
| 4 | * the Free Software Foundation; either version 2 of the License, or |
| 5 | * (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/device.h> |
| 23 | #include <linux/string.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/of.h> |
| 28 | #include <linux/of_address.h> |
| 29 | #include <linux/firmware.h> |
| 30 | #include <linux/io.h> |
| 31 | |
| 32 | #include "io.h" |
| 33 | |
| 34 | #ifdef CONFIG_B4860G100 |
| 35 | static struct gpiobus gbus; |
| 36 | #endif /* CONFIG_B4860G100 */ |
| 37 | |
| 38 | static inline void byte0_out(unsigned char data); |
| 39 | static inline void byte1_out(unsigned char data); |
| 40 | static inline void xl_cclk_b(int32_t i); |
| 41 | |
| 42 | |
| 43 | /* Assert and Deassert CCLK */ |
| 44 | void xl_shift_cclk(int count) |
| 45 | { |
| 46 | int i; |
| 47 | for (i = 0; i < count; i++) { |
| 48 | xl_cclk_b(1); |
| 49 | xl_cclk_b(0); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | int xl_supported_prog_bus_width(enum wbus bus_bytes) |
| 54 | { |
| 55 | switch (bus_bytes) { |
| 56 | case bus_1byte: |
| 57 | break; |
| 58 | case bus_2byte: |
| 59 | break; |
| 60 | default: |
| 61 | pr_err("unsupported program bus width %d\n", |
| 62 | bus_bytes); |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | /* Serialize byte and clock each bit on target's DIN and CCLK pins */ |
| 70 | void xl_shift_bytes_out(enum wbus bus_byte, unsigned char *pdata) |
| 71 | { |
| 72 | /* |
| 73 | * supports 1 and 2 bytes programming mode |
| 74 | */ |
| 75 | if (likely(bus_byte == bus_2byte)) |
| 76 | byte0_out(pdata[0]); |
| 77 | |
| 78 | byte1_out(pdata[1]); |
| 79 | xl_shift_cclk(1); |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * generic bit swap for xilinx SYSTEMMAP FPGA programming |
| 84 | */ |
| 85 | static inline unsigned char bitswap(unsigned char s) |
| 86 | { |
| 87 | unsigned char d; |
| 88 | d = (((s&0x80)>>7) | ((s&0x40)>>5) | ((s&0x20)>>3) | ((s&0x10)>>1) | |
| 89 | ((s&0x08)<<1) | ((s&0x04)<<3) | ((s&0x02)<<5) | ((s&0x01)<<7)); |
| 90 | return d; |
| 91 | } |
| 92 | |
| 93 | #ifdef CONFIG_B4860G100 |
| 94 | /* |
| 95 | * ====================================================================== |
| 96 | * board specific configuration |
| 97 | */ |
| 98 | |
| 99 | static inline void mpc85xx_gpio_set_dir( |
| 100 | int32_t port, |
| 101 | uint32_t mask, |
| 102 | uint32_t dir) |
| 103 | { |
| 104 | dir |= (in_be32(gbus.r[port]+GPDIR) & ~mask); |
| 105 | out_be32(gbus.r[port]+GPDIR, dir); |
| 106 | } |
| 107 | |
| 108 | static inline void mpc85xx_gpio_set(int32_t port, uint32_t mask, uint32_t val) |
| 109 | { |
| 110 | /* First mask off the unwanted parts of "dir" and "val" */ |
| 111 | val &= mask; |
| 112 | |
| 113 | /* Now read in the values we're supposed to preserve */ |
| 114 | val |= (in_be32(gbus.r[port]+GPDAT) & ~mask); |
| 115 | |
| 116 | out_be32(gbus.r[port]+GPDAT, val); |
| 117 | } |
| 118 | |
| 119 | static inline uint32_t mpc85xx_gpio_get(int32_t port, uint32_t mask) |
| 120 | { |
| 121 | /* Read the requested values */ |
| 122 | return in_be32(gbus.r[port]+GPDAT) & mask; |
| 123 | } |
| 124 | |
| 125 | static inline void mpc85xx_gpio_set_low(int32_t port, uint32_t gpios) |
| 126 | { |
| 127 | mpc85xx_gpio_set(port, gpios, 0x00000000); |
| 128 | } |
| 129 | |
| 130 | static inline void mpc85xx_gpio_set_high(int32_t port, uint32_t gpios) |
| 131 | { |
| 132 | mpc85xx_gpio_set(port, gpios, 0xFFFFFFFF); |
| 133 | } |
| 134 | |
| 135 | static inline void gpio_set_value(int32_t port, uint32_t gpio, uint32_t value) |
| 136 | { |
| 137 | int32_t g; |
| 138 | g = 31 - gpio; |
| 139 | if (value) |
| 140 | mpc85xx_gpio_set_high(port, 1U << g); |
| 141 | else |
| 142 | mpc85xx_gpio_set_low(port, 1U << g); |
| 143 | } |
| 144 | |
| 145 | static inline int gpio_get_value(int32_t port, uint32_t gpio) |
| 146 | { |
| 147 | int32_t g; |
| 148 | g = 31 - gpio; |
| 149 | return !!mpc85xx_gpio_get(port, 1U << g); |
| 150 | } |
| 151 | |
| 152 | static inline void xl_cclk_b(int32_t i) |
| 153 | { |
| 154 | gpio_set_value(XL_CCLK_PORT, XL_CCLK_PIN, i); |
| 155 | } |
| 156 | |
| 157 | void xl_program_b(int32_t i) |
| 158 | { |
| 159 | gpio_set_value(XL_PROGN_PORT, XL_PROGN_PIN, i); |
| 160 | } |
| 161 | |
| 162 | void xl_rdwr_b(int32_t i) |
| 163 | { |
| 164 | gpio_set_value(XL_RDWRN_PORT, XL_RDWRN_PIN, i); |
| 165 | } |
| 166 | |
| 167 | void xl_csi_b(int32_t i) |
| 168 | { |
| 169 | gpio_set_value(XL_CSIN_PORT, XL_CSIN_PIN, i); |
| 170 | } |
| 171 | |
| 172 | int xl_get_init_b(void) |
| 173 | { |
| 174 | return gpio_get_value(XL_INITN_PORT, XL_INITN_PIN); |
| 175 | } |
| 176 | |
| 177 | int xl_get_done_b(void) |
| 178 | { |
| 179 | return gpio_get_value(XL_DONE_PORT, XL_DONE_PIN); |
| 180 | } |
| 181 | |
| 182 | |
| 183 | /* G100 specific bit swap and remmap (to gpio pins) for byte 0 */ |
| 184 | static inline uint32_t bit_remap_byte0(uint32_t s) |
| 185 | { |
| 186 | uint32_t d; |
| 187 | d = (((s&0x80)>>7) | ((s&0x40)>>5) | ((s&0x20)>>3) | ((s&0x10)>>1) | |
| 188 | ((s&0x08)<<1) | ((s&0x04)<<3) | ((s&0x02)<<6) | ((s&0x01)<<9)); |
| 189 | return d; |
| 190 | } |
| 191 | |
| 192 | /* |
| 193 | * G100 specific MSB, in this order [byte0 | byte1], out |
| 194 | */ |
| 195 | static inline void byte0_out(unsigned char data) |
| 196 | { |
| 197 | uint32_t swap32; |
| 198 | swap32 = bit_remap_byte0((uint32_t) data) << 8; |
| 199 | |
| 200 | mpc85xx_gpio_set(0, 0x0002BF00, (uint32_t) swap32); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * G100 specific LSB, in this order [byte0 | byte1], out |
| 205 | */ |
| 206 | static inline void byte1_out(unsigned char data) |
| 207 | { |
| 208 | mpc85xx_gpio_set(0, 0x000000FF, (uint32_t) bitswap(data)); |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * configurable per device type for different I/O config |
| 213 | */ |
Monam Agarwal | 7e41d9c | 2014-03-02 04:17:01 +0530 | [diff] [blame] | 214 | int xl_init_io(void) |
Insop Song | e7185c69 | 2014-01-20 23:47:06 -0800 | [diff] [blame] | 215 | { |
| 216 | struct device_node *np; |
| 217 | const u32 *p_reg; |
| 218 | int reg, cnt; |
| 219 | |
| 220 | cnt = 0; |
| 221 | memset(&gbus, 0, sizeof(struct gpiobus)); |
| 222 | for_each_compatible_node(np, NULL, "fsl,qoriq-gpio") { |
| 223 | p_reg = of_get_property(np, "reg", NULL); |
| 224 | if (p_reg == NULL) |
| 225 | break; |
| 226 | reg = (int) *p_reg; |
| 227 | gbus.r[cnt] = of_iomap(np, 0); |
| 228 | |
| 229 | if (!gbus.r[cnt]) { |
| 230 | pr_err("not findding gpio cell-index %d\n", cnt); |
| 231 | return -ENODEV; |
| 232 | } |
| 233 | cnt++; |
| 234 | } |
| 235 | mpc85xx_gpio_set_dir(0, 0x0002BFFF, 0x0002BFFF); |
| 236 | mpc85xx_gpio_set_dir(1, 0x00240060, 0x00240060); |
| 237 | |
| 238 | gbus.ngpio = cnt; |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | #else /* placeholder for boards with different config */ |
| 245 | |
| 246 | void xl_program_b(int32_t i) |
| 247 | { |
| 248 | return; |
| 249 | } |
| 250 | |
| 251 | void xl_rdwr_b(int32_t i) |
| 252 | { |
| 253 | return; |
| 254 | } |
| 255 | |
| 256 | void xl_csi_b(int32_t i) |
| 257 | { |
| 258 | return; |
| 259 | } |
| 260 | |
| 261 | int xl_get_init_b(void) |
| 262 | { |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | int xl_get_done_b(void) |
| 267 | { |
| 268 | return -1; |
| 269 | } |
| 270 | |
| 271 | static inline void byte0_out(unsigned char data) |
| 272 | { |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | static inline void byte1_out(unsigned char data) |
| 277 | { |
| 278 | return; |
| 279 | } |
| 280 | |
| 281 | static inline void xl_cclk_b(int32_t i) |
| 282 | { |
| 283 | return; |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * configurable per device type for different I/O config |
| 288 | */ |
Monam Agarwal | 7e41d9c | 2014-03-02 04:17:01 +0530 | [diff] [blame] | 289 | int xl_init_io(void) |
Insop Song | e7185c69 | 2014-01-20 23:47:06 -0800 | [diff] [blame] | 290 | { |
| 291 | return -1; |
| 292 | } |
| 293 | |
| 294 | #endif /* CONFIG_B4860G100 */ |