382 lines
10 KiB
C
382 lines
10 KiB
C
/*
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* QTest testcase for the M25P80 Flash (Using the Aspeed SPI
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* Controller)
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*
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* Copyright (C) 2016 IBM Corp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/bswap.h"
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#include "libqtest-single.h"
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/*
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* ASPEED SPI Controller registers
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*/
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#define R_CONF 0x00
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#define CONF_ENABLE_W0 (1 << 16)
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#define R_CE_CTRL 0x04
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#define CRTL_EXTENDED0 0 /* 32 bit addressing for SPI */
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#define R_CTRL0 0x10
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#define CTRL_CE_STOP_ACTIVE (1 << 2)
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#define CTRL_READMODE 0x0
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#define CTRL_FREADMODE 0x1
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#define CTRL_WRITEMODE 0x2
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#define CTRL_USERMODE 0x3
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#define ASPEED_FMC_BASE 0x1E620000
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#define ASPEED_FLASH_BASE 0x20000000
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/*
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* Flash commands
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*/
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enum {
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JEDEC_READ = 0x9f,
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BULK_ERASE = 0xc7,
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READ = 0x03,
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PP = 0x02,
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WREN = 0x6,
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RESET_ENABLE = 0x66,
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RESET_MEMORY = 0x99,
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EN_4BYTE_ADDR = 0xB7,
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ERASE_SECTOR = 0xd8,
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};
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#define FLASH_JEDEC 0x20ba19 /* n25q256a */
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#define FLASH_SIZE (32 * 1024 * 1024)
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#define PAGE_SIZE 256
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/*
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* Use an explicit bswap for the values read/wrote to the flash region
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* as they are BE and the Aspeed CPU is LE.
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*/
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static inline uint32_t make_be32(uint32_t data)
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{
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return bswap32(data);
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}
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static void spi_conf(uint32_t value)
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{
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uint32_t conf = readl(ASPEED_FMC_BASE + R_CONF);
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conf |= value;
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writel(ASPEED_FMC_BASE + R_CONF, conf);
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}
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static void spi_conf_remove(uint32_t value)
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{
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uint32_t conf = readl(ASPEED_FMC_BASE + R_CONF);
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conf &= ~value;
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writel(ASPEED_FMC_BASE + R_CONF, conf);
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}
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static void spi_ce_ctrl(uint32_t value)
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{
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uint32_t conf = readl(ASPEED_FMC_BASE + R_CE_CTRL);
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conf |= value;
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writel(ASPEED_FMC_BASE + R_CE_CTRL, conf);
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}
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static void spi_ctrl_setmode(uint8_t mode, uint8_t cmd)
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{
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uint32_t ctrl = readl(ASPEED_FMC_BASE + R_CTRL0);
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ctrl &= ~(CTRL_USERMODE | 0xff << 16);
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ctrl |= mode | (cmd << 16);
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writel(ASPEED_FMC_BASE + R_CTRL0, ctrl);
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}
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static void spi_ctrl_start_user(void)
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{
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uint32_t ctrl = readl(ASPEED_FMC_BASE + R_CTRL0);
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ctrl |= CTRL_USERMODE | CTRL_CE_STOP_ACTIVE;
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writel(ASPEED_FMC_BASE + R_CTRL0, ctrl);
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ctrl &= ~CTRL_CE_STOP_ACTIVE;
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writel(ASPEED_FMC_BASE + R_CTRL0, ctrl);
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}
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static void spi_ctrl_stop_user(void)
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{
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uint32_t ctrl = readl(ASPEED_FMC_BASE + R_CTRL0);
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ctrl |= CTRL_USERMODE | CTRL_CE_STOP_ACTIVE;
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writel(ASPEED_FMC_BASE + R_CTRL0, ctrl);
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}
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static void flash_reset(void)
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{
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, RESET_ENABLE);
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writeb(ASPEED_FLASH_BASE, RESET_MEMORY);
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spi_ctrl_stop_user();
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spi_conf_remove(CONF_ENABLE_W0);
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}
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static void test_read_jedec(void)
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{
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uint32_t jedec = 0x0;
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, JEDEC_READ);
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jedec |= readb(ASPEED_FLASH_BASE) << 16;
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jedec |= readb(ASPEED_FLASH_BASE) << 8;
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jedec |= readb(ASPEED_FLASH_BASE);
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spi_ctrl_stop_user();
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flash_reset();
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g_assert_cmphex(jedec, ==, FLASH_JEDEC);
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}
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static void read_page(uint32_t addr, uint32_t *page)
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{
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int i;
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, EN_4BYTE_ADDR);
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writeb(ASPEED_FLASH_BASE, READ);
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writel(ASPEED_FLASH_BASE, make_be32(addr));
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/* Continuous read are supported */
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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page[i] = make_be32(readl(ASPEED_FLASH_BASE));
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}
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spi_ctrl_stop_user();
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}
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static void read_page_mem(uint32_t addr, uint32_t *page)
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{
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int i;
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/* move out USER mode to use direct reads from the AHB bus */
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spi_ctrl_setmode(CTRL_READMODE, READ);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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page[i] = make_be32(readl(ASPEED_FLASH_BASE + addr + i * 4));
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}
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}
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static void test_erase_sector(void)
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{
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uint32_t some_page_addr = 0x600 * PAGE_SIZE;
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uint32_t page[PAGE_SIZE / 4];
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int i;
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, WREN);
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writeb(ASPEED_FLASH_BASE, EN_4BYTE_ADDR);
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writeb(ASPEED_FLASH_BASE, ERASE_SECTOR);
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writel(ASPEED_FLASH_BASE, make_be32(some_page_addr));
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spi_ctrl_stop_user();
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/* Previous page should be full of zeroes as backend is not
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* initialized */
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read_page(some_page_addr - PAGE_SIZE, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0x0);
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}
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/* But this one was erased */
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read_page(some_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0xffffffff);
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}
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flash_reset();
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}
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static void test_erase_all(void)
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{
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uint32_t some_page_addr = 0x15000 * PAGE_SIZE;
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uint32_t page[PAGE_SIZE / 4];
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int i;
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spi_conf(CONF_ENABLE_W0);
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/* Check some random page. Should be full of zeroes as backend is
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* not initialized */
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read_page(some_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0x0);
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}
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, WREN);
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writeb(ASPEED_FLASH_BASE, BULK_ERASE);
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spi_ctrl_stop_user();
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/* Recheck that some random page */
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read_page(some_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0xffffffff);
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}
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flash_reset();
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}
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static void test_write_page(void)
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{
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uint32_t my_page_addr = 0x14000 * PAGE_SIZE; /* beyond 16MB */
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uint32_t some_page_addr = 0x15000 * PAGE_SIZE;
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uint32_t page[PAGE_SIZE / 4];
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int i;
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, EN_4BYTE_ADDR);
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writeb(ASPEED_FLASH_BASE, WREN);
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writeb(ASPEED_FLASH_BASE, PP);
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writel(ASPEED_FLASH_BASE, make_be32(my_page_addr));
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/* Fill the page with its own addresses */
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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writel(ASPEED_FLASH_BASE, make_be32(my_page_addr + i * 4));
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}
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spi_ctrl_stop_user();
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/* Check what was written */
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read_page(my_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
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}
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/* Check some other page. It should be full of 0xff */
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read_page(some_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0xffffffff);
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}
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flash_reset();
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}
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static void test_read_page_mem(void)
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{
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uint32_t my_page_addr = 0x14000 * PAGE_SIZE; /* beyond 16MB */
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uint32_t some_page_addr = 0x15000 * PAGE_SIZE;
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uint32_t page[PAGE_SIZE / 4];
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int i;
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/* Enable 4BYTE mode for controller. This is should be strapped by
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* HW for CE0 anyhow.
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*/
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spi_ce_ctrl(1 << CRTL_EXTENDED0);
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/* Enable 4BYTE mode for flash. */
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, EN_4BYTE_ADDR);
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spi_ctrl_stop_user();
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spi_conf_remove(CONF_ENABLE_W0);
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/* Check what was written */
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read_page_mem(my_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
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}
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/* Check some other page. It should be full of 0xff */
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read_page_mem(some_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, 0xffffffff);
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}
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flash_reset();
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}
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static void test_write_page_mem(void)
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{
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uint32_t my_page_addr = 0x15000 * PAGE_SIZE;
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uint32_t page[PAGE_SIZE / 4];
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int i;
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/* Enable 4BYTE mode for controller. This is should be strapped by
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* HW for CE0 anyhow.
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*/
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spi_ce_ctrl(1 << CRTL_EXTENDED0);
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/* Enable 4BYTE mode for flash. */
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spi_conf(CONF_ENABLE_W0);
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spi_ctrl_start_user();
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writeb(ASPEED_FLASH_BASE, EN_4BYTE_ADDR);
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writeb(ASPEED_FLASH_BASE, WREN);
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spi_ctrl_stop_user();
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/* move out USER mode to use direct writes to the AHB bus */
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spi_ctrl_setmode(CTRL_WRITEMODE, PP);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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writel(ASPEED_FLASH_BASE + my_page_addr + i * 4,
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make_be32(my_page_addr + i * 4));
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}
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/* Check what was written */
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read_page_mem(my_page_addr, page);
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for (i = 0; i < PAGE_SIZE / 4; i++) {
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g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
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}
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flash_reset();
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}
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static char tmp_path[] = "/tmp/qtest.m25p80.XXXXXX";
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int main(int argc, char **argv)
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{
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int ret;
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int fd;
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g_test_init(&argc, &argv, NULL);
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fd = mkstemp(tmp_path);
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g_assert(fd >= 0);
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ret = ftruncate(fd, FLASH_SIZE);
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g_assert(ret == 0);
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close(fd);
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global_qtest = qtest_initf("-m 256 -machine palmetto-bmc "
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"-drive file=%s,format=raw,if=mtd",
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tmp_path);
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qtest_add_func("/m25p80/read_jedec", test_read_jedec);
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qtest_add_func("/m25p80/erase_sector", test_erase_sector);
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qtest_add_func("/m25p80/erase_all", test_erase_all);
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qtest_add_func("/m25p80/write_page", test_write_page);
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qtest_add_func("/m25p80/read_page_mem", test_read_page_mem);
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qtest_add_func("/m25p80/write_page_mem", test_write_page_mem);
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ret = g_test_run();
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qtest_quit(global_qtest);
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unlink(tmp_path);
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return ret;
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}
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