xref: /openbmc/qemu/tests/qtest/aspeed-smc-utils.c (revision 11d94251)

/*
 * QTest testcase for the M25P80 Flash (Using the Aspeed SPI
 * Controller)
 *
 * Copyright (C) 2016 IBM Corp.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include "qemu/bswap.h"
#include "libqtest-single.h"
#include "qemu/bitops.h"
#include "aspeed-smc-utils.h"

/*
 * Use an explicit bswap for the values read/wrote to the flash region
 * as they are BE and the Aspeed CPU is LE.
 */
static inline uint32_t make_be32(uint32_t data)
{
    return bswap32(data);
}

static inline void spi_writel(const AspeedSMCTestData *data, uint64_t offset,
                              uint32_t value)
{
    qtest_writel(data->s, data->spi_base + offset, value);
}

static inline uint32_t spi_readl(const AspeedSMCTestData *data, uint64_t offset)
{
    return qtest_readl(data->s, data->spi_base + offset);
}

static inline void flash_writeb(const AspeedSMCTestData *data, uint64_t offset,
                                uint8_t value)
{
    qtest_writeb(data->s, data->flash_base + offset, value);
}

static inline void flash_writel(const AspeedSMCTestData *data, uint64_t offset,
                                uint32_t value)
{
    qtest_writel(data->s, data->flash_base + offset, value);
}

static inline uint8_t flash_readb(const AspeedSMCTestData *data,
                                  uint64_t offset)
{
    return qtest_readb(data->s, data->flash_base + offset);
}

static inline uint32_t flash_readl(const AspeedSMCTestData *data,
                                   uint64_t offset)
{
    return qtest_readl(data->s, data->flash_base + offset);
}

static void spi_conf(const AspeedSMCTestData *data, uint32_t value)
{
    uint32_t conf = spi_readl(data, R_CONF);

    conf |= value;
    spi_writel(data, R_CONF, conf);
}

static void spi_conf_remove(const AspeedSMCTestData *data, uint32_t value)
{
    uint32_t conf = spi_readl(data, R_CONF);

    conf &= ~value;
    spi_writel(data, R_CONF, conf);
}

static void spi_ce_ctrl(const AspeedSMCTestData *data, uint32_t value)
{
    uint32_t conf = spi_readl(data, R_CE_CTRL);

    conf |= value;
    spi_writel(data, R_CE_CTRL, conf);
}

static void spi_ctrl_setmode(const AspeedSMCTestData *data, uint8_t mode,
                             uint8_t cmd)
{
    uint32_t ctrl_reg = R_CTRL0 + data->cs * 4;
    uint32_t ctrl = spi_readl(data, ctrl_reg);
    ctrl &= ~(CTRL_USERMODE | 0xff << 16);
    ctrl |= mode | (cmd << 16);
    spi_writel(data, ctrl_reg, ctrl);
}

static void spi_ctrl_start_user(const AspeedSMCTestData *data)
{
    uint32_t ctrl_reg = R_CTRL0 + data->cs * 4;
    uint32_t ctrl = spi_readl(data, ctrl_reg);

    ctrl |= CTRL_USERMODE | CTRL_CE_STOP_ACTIVE;
    spi_writel(data, ctrl_reg, ctrl);

    ctrl &= ~CTRL_CE_STOP_ACTIVE;
    spi_writel(data, ctrl_reg, ctrl);
}

static void spi_ctrl_stop_user(const AspeedSMCTestData *data)
{
    uint32_t ctrl_reg = R_CTRL0 + data->cs * 4;
    uint32_t ctrl = spi_readl(data, ctrl_reg);

    ctrl |= CTRL_USERMODE | CTRL_CE_STOP_ACTIVE;
    spi_writel(data, ctrl_reg, ctrl);
}

static void spi_ctrl_set_io_mode(const AspeedSMCTestData *data, uint32_t value)
{
    uint32_t ctrl_reg = R_CTRL0 + data->cs * 4;
    uint32_t ctrl = spi_readl(data, ctrl_reg);
    uint32_t mode;

    mode = value & CTRL_IO_MODE_MASK;
    ctrl &= ~CTRL_IO_MODE_MASK;
    ctrl |= mode;
    spi_writel(data, ctrl_reg, ctrl);
}

static void flash_reset(const AspeedSMCTestData *data)
{
    spi_conf(data, 1 << (CONF_ENABLE_W0 + data->cs));

    spi_ctrl_start_user(data);
    flash_writeb(data, 0, RESET_ENABLE);
    flash_writeb(data, 0, RESET_MEMORY);
    flash_writeb(data, 0, WREN);
    flash_writeb(data, 0, BULK_ERASE);
    flash_writeb(data, 0, WRDI);
    spi_ctrl_stop_user(data);

    spi_conf_remove(data, 1 << (CONF_ENABLE_W0 + data->cs));
}

static void read_page(const AspeedSMCTestData *data, uint32_t addr,
                      uint32_t *page)
{
    int i;

    spi_ctrl_start_user(data);

    flash_writeb(data, 0, EN_4BYTE_ADDR);
    flash_writeb(data, 0, READ);
    flash_writel(data, 0, make_be32(addr));

    /* Continuous read are supported */
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        page[i] = make_be32(flash_readl(data, 0));
    }
    spi_ctrl_stop_user(data);
}

static void read_page_mem(const AspeedSMCTestData *data, uint32_t addr,
                          uint32_t *page)
{
    int i;

    /* move out USER mode to use direct reads from the AHB bus */
    spi_ctrl_setmode(data, CTRL_READMODE, READ);

    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        page[i] = make_be32(flash_readl(data, addr + i * 4));
    }
}

static void write_page_mem(const AspeedSMCTestData *data, uint32_t addr,
                           uint32_t write_value)
{
    spi_ctrl_setmode(data, CTRL_WRITEMODE, PP);

    for (int i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(data, addr + i * 4, write_value);
    }
}

static void assert_page_mem(const AspeedSMCTestData *data, uint32_t addr,
                            uint32_t expected_value)
{
    uint32_t page[FLASH_PAGE_SIZE / 4];
    read_page_mem(data, addr, page);
    for (int i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, expected_value);
    }
}

void aspeed_smc_test_read_jedec(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t jedec = 0x0;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, JEDEC_READ);
    jedec |= flash_readb(test_data, 0) << 16;
    jedec |= flash_readb(test_data, 0) << 8;
    jedec |= flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);

    flash_reset(test_data);

    g_assert_cmphex(jedec, ==, test_data->jedec_id);
}

void aspeed_smc_test_erase_sector(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t some_page_addr = test_data->page_addr;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    int i;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    /*
     * Previous page should be full of 0xffs after backend is
     * initialized
     */
    read_page(test_data, some_page_addr - FLASH_PAGE_SIZE, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, PP);
    flash_writel(test_data, 0, make_be32(some_page_addr));

    /* Fill the page with its own addresses */
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, 0, make_be32(some_page_addr + i * 4));
    }
    spi_ctrl_stop_user(test_data);

    /* Check the page is correctly written */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, some_page_addr + i * 4);
    }

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, ERASE_SECTOR);
    flash_writel(test_data, 0, make_be32(some_page_addr));
    spi_ctrl_stop_user(test_data);

    /* Check the page is erased */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    flash_reset(test_data);
}

void aspeed_smc_test_erase_all(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t some_page_addr = test_data->page_addr;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    int i;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    /*
     * Previous page should be full of 0xffs after backend is
     * initialized
     */
    read_page(test_data, some_page_addr - FLASH_PAGE_SIZE, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, PP);
    flash_writel(test_data, 0, make_be32(some_page_addr));

    /* Fill the page with its own addresses */
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, 0, make_be32(some_page_addr + i * 4));
    }
    spi_ctrl_stop_user(test_data);

    /* Check the page is correctly written */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, some_page_addr + i * 4);
    }

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, BULK_ERASE);
    spi_ctrl_stop_user(test_data);

    /* Check the page is erased */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    flash_reset(test_data);
}

void aspeed_smc_test_write_page(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t my_page_addr = test_data->page_addr;
    uint32_t some_page_addr = my_page_addr + FLASH_PAGE_SIZE;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    int i;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, PP);
    flash_writel(test_data, 0, make_be32(my_page_addr));

    /* Fill the page with its own addresses */
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, 0, make_be32(my_page_addr + i * 4));
    }
    spi_ctrl_stop_user(test_data);

    /* Check what was written */
    read_page(test_data, my_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
    }

    /* Check some other page. It should be full of 0xff */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    flash_reset(test_data);
}

void aspeed_smc_test_read_page_mem(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t my_page_addr = test_data->page_addr;
    uint32_t some_page_addr = my_page_addr + FLASH_PAGE_SIZE;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    int i;

    /*
     * Enable 4BYTE mode for controller.
     */
    spi_ce_ctrl(test_data, 1 << (CRTL_EXTENDED0 + test_data->cs));

    /* Enable 4BYTE mode for flash. */
    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, PP);
    flash_writel(test_data, 0, make_be32(my_page_addr));

    /* Fill the page with its own addresses */
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, 0, make_be32(my_page_addr + i * 4));
    }
    spi_ctrl_stop_user(test_data);
    spi_conf_remove(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    /* Check what was written */
    read_page_mem(test_data, my_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
    }

    /* Check some other page. It should be full of 0xff */
    read_page_mem(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    flash_reset(test_data);
}

void aspeed_smc_test_write_page_mem(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t my_page_addr = test_data->page_addr;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    int i;

    /*
     * Enable 4BYTE mode for controller.
     */
    spi_ce_ctrl(test_data, 1 << (CRTL_EXTENDED0 + test_data->cs));

    /* Enable 4BYTE mode for flash. */
    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    spi_ctrl_stop_user(test_data);

    /* move out USER mode to use direct writes to the AHB bus */
    spi_ctrl_setmode(test_data, CTRL_WRITEMODE, PP);

    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, my_page_addr + i * 4,
               make_be32(my_page_addr + i * 4));
    }

    /* Check what was written */
    read_page_mem(test_data, my_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
    }

    flash_reset(test_data);
}

void aspeed_smc_test_read_status_reg(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint8_t r;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);

    g_assert_cmphex(r & SR_WEL, ==, 0);
    g_assert(!qtest_qom_get_bool
            (test_data->s, test_data->node, "write-enable"));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);

    g_assert_cmphex(r & SR_WEL, ==, SR_WEL);
    g_assert(qtest_qom_get_bool
            (test_data->s, test_data->node, "write-enable"));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WRDI);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);

    g_assert_cmphex(r & SR_WEL, ==, 0);
    g_assert(!qtest_qom_get_bool
            (test_data->s, test_data->node, "write-enable"));

    flash_reset(test_data);
}

void aspeed_smc_test_status_reg_write_protection(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint8_t r;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    /* default case: WP# is high and SRWD is low -> status register writable */
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    /* test ability to write SRWD */
    flash_writeb(test_data, 0, WRSR);
    flash_writeb(test_data, 0, SRWD);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);
    g_assert_cmphex(r & SRWD, ==, SRWD);

    /* WP# high and SRWD high -> status register writable */
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    /* test ability to write SRWD */
    flash_writeb(test_data, 0, WRSR);
    flash_writeb(test_data, 0, 0);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);
    g_assert_cmphex(r & SRWD, ==, 0);

    /* WP# low and SRWD low -> status register writable */
    qtest_set_irq_in(test_data->s, test_data->node, "WP#", 0, 0);
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, WREN);
    /* test ability to write SRWD */
    flash_writeb(test_data, 0, WRSR);
    flash_writeb(test_data, 0, SRWD);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);
    g_assert_cmphex(r & SRWD, ==, SRWD);

    /* WP# low and SRWD high -> status register NOT writable */
    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0 , WREN);
    /* test ability to write SRWD */
    flash_writeb(test_data, 0, WRSR);
    flash_writeb(test_data, 0, 0);
    flash_writeb(test_data, 0, RDSR);
    r = flash_readb(test_data, 0);
    spi_ctrl_stop_user(test_data);
    /* write is not successful */
    g_assert_cmphex(r & SRWD, ==, SRWD);

    qtest_set_irq_in(test_data->s, test_data->node, "WP#", 0, 1);
    flash_reset(test_data);
}

void aspeed_smc_test_write_block_protect(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t sector_size = 65536;
    uint32_t n_sectors = 512;

    spi_ce_ctrl(test_data, 1 << (CRTL_EXTENDED0 + test_data->cs));
    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    uint32_t bp_bits = 0b0;

    for (int i = 0; i < 16; i++) {
        bp_bits = ((i & 0b1000) << 3) | ((i & 0b0111) << 2);

        spi_ctrl_start_user(test_data);
        flash_writeb(test_data, 0, WREN);
        flash_writeb(test_data, 0, BULK_ERASE);
        flash_writeb(test_data, 0, WREN);
        flash_writeb(test_data, 0, WRSR);
        flash_writeb(test_data, 0, bp_bits);
        flash_writeb(test_data, 0, EN_4BYTE_ADDR);
        flash_writeb(test_data, 0, WREN);
        spi_ctrl_stop_user(test_data);

        uint32_t num_protected_sectors = i ? MIN(1 << (i - 1), n_sectors) : 0;
        uint32_t protection_start = n_sectors - num_protected_sectors;
        uint32_t protection_end = n_sectors;

        for (int sector = 0; sector < n_sectors; sector++) {
            uint32_t addr = sector * sector_size;

            assert_page_mem(test_data, addr, 0xffffffff);
            write_page_mem(test_data, addr, make_be32(0xabcdef12));

            uint32_t expected_value = protection_start <= sector
                                      && sector < protection_end
                                      ? 0xffffffff : 0xabcdef12;

            assert_page_mem(test_data, addr, expected_value);
        }
    }

    flash_reset(test_data);
}

void aspeed_smc_test_write_block_protect_bottom_bit(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t sector_size = 65536;
    uint32_t n_sectors = 512;

    spi_ce_ctrl(test_data, 1 << (CRTL_EXTENDED0 + test_data->cs));
    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    /* top bottom bit is enabled */
    uint32_t bp_bits = 0b00100 << 3;

    for (int i = 0; i < 16; i++) {
        bp_bits = (((i & 0b1000) | 0b0100) << 3) | ((i & 0b0111) << 2);

        spi_ctrl_start_user(test_data);
        flash_writeb(test_data, 0, WREN);
        flash_writeb(test_data, 0, BULK_ERASE);
        flash_writeb(test_data, 0, WREN);
        flash_writeb(test_data, 0, WRSR);
        flash_writeb(test_data, 0, bp_bits);
        flash_writeb(test_data, 0, EN_4BYTE_ADDR);
        flash_writeb(test_data, 0, WREN);
        spi_ctrl_stop_user(test_data);

        uint32_t num_protected_sectors = i ? MIN(1 << (i - 1), n_sectors) : 0;
        uint32_t protection_start = 0;
        uint32_t protection_end = num_protected_sectors;

        for (int sector = 0; sector < n_sectors; sector++) {
            uint32_t addr = sector * sector_size;

            assert_page_mem(test_data, addr, 0xffffffff);
            write_page_mem(test_data, addr, make_be32(0xabcdef12));

            uint32_t expected_value = protection_start <= sector
                                      && sector < protection_end
                                      ? 0xffffffff : 0xabcdef12;

            assert_page_mem(test_data, addr, expected_value);
        }
    }

    flash_reset(test_data);
}

void aspeed_smc_test_write_page_qpi(const void *data)
{
    const AspeedSMCTestData *test_data = (const AspeedSMCTestData *)data;
    uint32_t my_page_addr = test_data->page_addr;
    uint32_t some_page_addr = my_page_addr + FLASH_PAGE_SIZE;
    uint32_t page[FLASH_PAGE_SIZE / 4];
    uint32_t page_pattern[] = {
        0xebd8c134, 0x5da196bc, 0xae15e729, 0x5085ccdf
    };
    int i;

    spi_conf(test_data, 1 << (CONF_ENABLE_W0 + test_data->cs));

    spi_ctrl_start_user(test_data);
    flash_writeb(test_data, 0, EN_4BYTE_ADDR);
    flash_writeb(test_data, 0, WREN);
    flash_writeb(test_data, 0, PP);
    flash_writel(test_data, 0, make_be32(my_page_addr));

    /* Set QPI mode */
    spi_ctrl_set_io_mode(test_data, CTRL_IO_QUAD_IO);

    /* Fill the page pattern */
    for (i = 0; i < ARRAY_SIZE(page_pattern); i++) {
        flash_writel(test_data, 0, make_be32(page_pattern[i]));
    }

    /* Fill the page with its own addresses */
    for (; i < FLASH_PAGE_SIZE / 4; i++) {
        flash_writel(test_data, 0, make_be32(my_page_addr + i * 4));
    }

    /* Restore io mode */
    spi_ctrl_set_io_mode(test_data, 0);
    spi_ctrl_stop_user(test_data);

    /* Check what was written */
    read_page(test_data, my_page_addr, page);
    for (i = 0; i < ARRAY_SIZE(page_pattern); i++) {
        g_assert_cmphex(page[i], ==, page_pattern[i]);
    }
    for (; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, my_page_addr + i * 4);
    }

    /* Check some other page. It should be full of 0xff */
    read_page(test_data, some_page_addr, page);
    for (i = 0; i < FLASH_PAGE_SIZE / 4; i++) {
        g_assert_cmphex(page[i], ==, 0xffffffff);
    }

    flash_reset(test_data);
}