rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2015 Brian Swetland |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files |
| 6 | * (the "Software"), to deal in the Software without restriction, |
| 7 | * including without limitation the rights to use, copy, modify, merge, |
| 8 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 9 | * and to permit persons to whom the Software is furnished to do so, |
| 10 | * subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | #include <debug.h> |
| 25 | #include <string.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <printf.h> |
| 28 | #include <reg.h> |
| 29 | |
| 30 | #include <platform/lpc43xx-spifi.h> |
| 31 | |
| 32 | #define CMD_PAGE_PROGRAM 0x02 |
| 33 | #define CMD_READ_DATA 0x03 |
| 34 | #define CMD_READ_STATUS 0x05 |
| 35 | #define CMD_WRITE_ENABLE 0x06 |
| 36 | #define CMD_SECTOR_ERASE 0x20 |
| 37 | |
| 38 | static void spifi_write_enable(void) { |
| 39 | writel(CMD_FF_SERIAL | CMD_FR_OP | CMD_OPCODE(CMD_WRITE_ENABLE), |
| 40 | SPIFI_CMD); |
| 41 | while (readl(SPIFI_STAT) & STAT_CMD) ; |
| 42 | } |
| 43 | |
| 44 | static void spifi_wait_busy(void) { |
| 45 | while (readl(SPIFI_STAT) & STAT_CMD) ; |
| 46 | writel(CMD_POLLBIT(0) | CMD_POLLCLR | CMD_POLL | |
| 47 | CMD_FF_SERIAL | CMD_FR_OP | CMD_OPCODE(CMD_READ_STATUS), |
| 48 | SPIFI_CMD); |
| 49 | while (readl(SPIFI_STAT) & STAT_CMD) ; |
| 50 | // discard matching status byte from fifo |
| 51 | readb(SPIFI_DATA); |
| 52 | } |
| 53 | |
| 54 | void spifi_page_program(u32 addr, u32 *ptr, u32 count) { |
| 55 | spifi_write_enable(); |
| 56 | writel(addr, SPIFI_ADDR); |
| 57 | writel(CMD_DATALEN(count * 4) | CMD_FF_SERIAL | CMD_FR_OP_3B | |
| 58 | CMD_DOUT | CMD_OPCODE(CMD_PAGE_PROGRAM), SPIFI_CMD); |
| 59 | while (count-- > 0) { |
| 60 | writel(*ptr++, SPIFI_DATA); |
| 61 | } |
| 62 | spifi_wait_busy(); |
| 63 | } |
| 64 | |
| 65 | void spifi_sector_erase(u32 addr) { |
| 66 | spifi_write_enable(); |
| 67 | writel(addr, SPIFI_ADDR); |
| 68 | writel(CMD_FF_SERIAL | CMD_FR_OP_3B | CMD_OPCODE(CMD_SECTOR_ERASE), |
| 69 | SPIFI_CMD); |
| 70 | spifi_wait_busy(); |
| 71 | } |
| 72 | |
| 73 | int spifi_verify_erased(u32 addr, u32 count) { |
| 74 | int err = 0; |
| 75 | writel(addr, SPIFI_ADDR); |
| 76 | writel(CMD_DATALEN(count * 4) | CMD_FF_SERIAL | CMD_FR_OP_3B | |
| 77 | CMD_OPCODE(CMD_READ_DATA), SPIFI_CMD); |
| 78 | while (count-- > 0) { |
| 79 | if (readl(SPIFI_DATA) != 0xFFFFFFFF) err = -1; |
| 80 | } |
| 81 | while (readl(SPIFI_STAT) & STAT_CMD) ; |
| 82 | return err; |
| 83 | } |
| 84 | |
| 85 | int spifi_verify_page(u32 addr, u32 *ptr) { |
| 86 | int count = 256 / 4; |
| 87 | int err = 0; |
| 88 | writel(addr, SPIFI_ADDR); |
| 89 | writel(CMD_DATALEN(count * 4) | CMD_FF_SERIAL | CMD_FR_OP_3B | |
| 90 | CMD_OPCODE(CMD_READ_DATA), SPIFI_CMD); |
| 91 | while (count-- > 0) { |
| 92 | if (readl(SPIFI_DATA) != *ptr++) err = -1; |
| 93 | } |
| 94 | while (readl(SPIFI_STAT) & STAT_CMD) ; |
| 95 | return err; |
| 96 | } |
| 97 | |
| 98 | // at reset-stop, all clocks are running from 12MHz internal osc |
| 99 | // todo: run SPIFI_CLK at a much higher rate |
| 100 | // todo: use 4bit modes |
| 101 | void spifi_init(void) { |
| 102 | // reset spifi controller |
| 103 | writel(STAT_RESET, SPIFI_STAT); |
| 104 | while (readl(SPIFI_STAT) & STAT_RESET) ; |
| 105 | writel(0xFFFFF, SPIFI_CTRL); |
| 106 | } |
| 107 | |