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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */
#include <linux/iopoll.h>
#include <linux/pci.h>
#include "wx_type.h"
#include "wx_hw.h"
/* cmd_addr is used for some special command:
* 1. to be sector address, when implemented erase sector command
* 2. to be flash address when implemented read, write flash address
*/
static int wx_fmgr_cmd_op(struct wx_hw *wxhw, u32 cmd, u32 cmd_addr)
{
u32 cmd_val = 0, val = 0;
cmd_val = WX_SPI_CMD_CMD(cmd) |
WX_SPI_CMD_CLK(WX_SPI_CLK_DIV) |
cmd_addr;
wr32(wxhw, WX_SPI_CMD, cmd_val);
return read_poll_timeout(rd32, val, (val & 0x1), 10, 100000,
false, wxhw, WX_SPI_STATUS);
}
static int wx_flash_read_dword(struct wx_hw *wxhw, u32 addr, u32 *data)
{
int ret = 0;
ret = wx_fmgr_cmd_op(wxhw, WX_SPI_CMD_READ_DWORD, addr);
if (ret < 0)
return ret;
*data = rd32(wxhw, WX_SPI_DATA);
return ret;
}
int wx_check_flash_load(struct wx_hw *hw, u32 check_bit)
{
u32 reg = 0;
int err = 0;
/* if there's flash existing */
if (!(rd32(hw, WX_SPI_STATUS) &
WX_SPI_STATUS_FLASH_BYPASS)) {
/* wait hw load flash done */
err = read_poll_timeout(rd32, reg, !(reg & check_bit), 20000, 2000000,
false, hw, WX_SPI_ILDR_STATUS);
if (err < 0)
wx_err(hw, "Check flash load timeout.\n");
}
return err;
}
EXPORT_SYMBOL(wx_check_flash_load);
int wx_sw_init(struct wx_hw *wxhw)
{
struct pci_dev *pdev = wxhw->pdev;
u32 ssid = 0;
int err = 0;
wxhw->vendor_id = pdev->vendor;
wxhw->device_id = pdev->device;
wxhw->revision_id = pdev->revision;
wxhw->oem_svid = pdev->subsystem_vendor;
wxhw->oem_ssid = pdev->subsystem_device;
wxhw->bus.device = PCI_SLOT(pdev->devfn);
wxhw->bus.func = PCI_FUNC(pdev->devfn);
if (wxhw->oem_svid == PCI_VENDOR_ID_WANGXUN) {
wxhw->subsystem_vendor_id = pdev->subsystem_vendor;
wxhw->subsystem_device_id = pdev->subsystem_device;
} else {
err = wx_flash_read_dword(wxhw, 0xfffdc, &ssid);
if (!err)
wxhw->subsystem_device_id = swab16((u16)ssid);
return err;
}
return 0;
}
EXPORT_SYMBOL(wx_sw_init);
MODULE_LICENSE("GPL");
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