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Subject[PATCH v3 2/4] usb: xhci: Use register defined and field names
Date
Instead of using register values and fields lets define them and
use in the driver.

Tested-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>
---
drivers/usb/host/xhci-pci.c | 60 ++++++++++++++++++++++++++-----------
1 file changed, 43 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 89ca46dd6825..3374a85574c2 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -57,6 +57,27 @@
#define PCI_DEVICE_ID_AMD_PROMONTORYA_1 0x43bc
#define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI 0x1142

+#define RENESAS_FW_VERSION 0x6C
+#define RENESAS_ROM_CONFIG 0xF0
+#define RENESAS_FW_STATUS 0xF4
+#define RENESAS_FW_STATUS_MSB 0xF5
+#define RENESAS_ROM_STATUS 0xF6
+#define RENESAS_ROM_STATUS_MSB 0xF7
+#define RENESAS_DATA0 0xF8
+#define RENESAS_DATA1 0xFC
+
+#define RENESAS_FW_VERSION_FIELD GENMASK(23, 7)
+#define RENESAS_FW_VERSION_OFFSET 8
+
+#define RENESAS_FW_STATUS_DOWNLOAD_ENABLE BIT(0)
+#define RENESAS_FW_STATUS_LOCK BIT(1)
+#define RENESAS_FW_STATUS_RESULT GENMASK(6, 4)
+ #define RENESAS_FW_STATUS_INVALID 0
+ #define RENESAS_FW_STATUS_SUCCESS BIT(4)
+ #define RENESAS_FW_STATUS_ERROR BIT(5)
+#define RENESAS_FW_STATUS_SET_DATA0 BIT(8)
+#define RENESAS_FW_STATUS_SET_DATA1 BIT(9)
+
#define RENESAS_RETRY 1000
#define RENESAS_DELAY 10

@@ -347,7 +368,8 @@ static int renesas_fw_download_image(struct pci_dev *dev,

/* step+1. Read "Set DATAX" and confirm it is cleared. */
for (i = 0; i < RENESAS_RETRY; i++) {
- err = pci_read_config_byte(dev, 0xF5, &fw_status);
+ err = pci_read_config_byte(dev, RENESAS_FW_STATUS_MSB,
+ &fw_status);
if (err)
return pcibios_err_to_errno(err);
if (!(fw_status & BIT(data0_or_data1)))
@@ -362,7 +384,8 @@ static int renesas_fw_download_image(struct pci_dev *dev,
* step+2. Write FW data to "DATAX".
* "LSB is left" => force little endian
*/
- err = pci_write_config_dword(dev, data0_or_data1 ? 0xFC : 0xF8,
+ err = pci_write_config_dword(dev, data0_or_data1 ?
+ RENESAS_DATA1 : RENESAS_DATA0,
(__force u32)cpu_to_le32(fw[step]));
if (err)
return pcibios_err_to_errno(err);
@@ -370,7 +393,8 @@ static int renesas_fw_download_image(struct pci_dev *dev,
udelay(100);

/* step+3. Set "Set DATAX". */
- err = pci_write_config_byte(dev, 0xF5, BIT(data0_or_data1));
+ err = pci_write_config_byte(dev, RENESAS_FW_STATUS_MSB,
+ BIT(data0_or_data1));
if (err)
return pcibios_err_to_errno(err);

@@ -440,7 +464,7 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
* BIOSes will initialize the device for us. If the device is
* initialized.
*/
- err = pci_read_config_byte(pdev, 0xF4, &fw_state);
+ err = pci_read_config_byte(pdev, RENESAS_FW_STATUS, &fw_state);
if (err)
return pcibios_err_to_errno(err);

@@ -449,10 +473,10 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
* ready we can simply continue. If the FW is not ready, we have
* to give up.
*/
- if (fw_state & BIT(1)) {
+ if (fw_state & RENESAS_FW_STATUS_LOCK) {
dev_dbg(&pdev->dev, "FW Download Lock is engaged.");

- if (fw_state & BIT(4))
+ if (fw_state & RENESAS_FW_STATUS_SUCCESS)
return 0;

dev_err(&pdev->dev,
@@ -465,33 +489,33 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
* with it and it can't be resetted, we have to give up too... and
* ask for a forgiveness and a reboot.
*/
- if (fw_state & BIT(0)) {
+ if (fw_state & RENESAS_FW_STATUS_DOWNLOAD_ENABLE) {
dev_err(&pdev->dev,
"FW Download Enable is stale. Giving Up (poweroff/reboot needed).");
return -EIO;
}

/* Otherwise, Check the "Result Code" Bits (6:4) and act accordingly */
- switch ((fw_state & 0x70)) {
+ switch (fw_state & RENESAS_FW_STATUS_RESULT) {
case 0: /* No result yet */
dev_dbg(&pdev->dev, "FW is not ready/loaded yet.");

/* tell the caller, that this device needs the firmware. */
return 1;

- case BIT(4): /* Success, device should be working. */
+ case RENESAS_FW_STATUS_SUCCESS: /* Success, device should be working. */
dev_dbg(&pdev->dev, "FW is ready.");
return 0;

- case BIT(5): /* Error State */
+ case RENESAS_FW_STATUS_ERROR: /* Error State */
dev_err(&pdev->dev,
"hardware is in an error state. Giving up (poweroff/reboot needed).");
return -ENODEV;

default: /* All other states are marked as "Reserved states" */
dev_err(&pdev->dev,
- "hardware is in an invalid state %x. Giving up (poweroff/reboot needed).",
- (fw_state & 0x70) >> 4);
+ "hardware is in an invalid state %lx. Giving up (poweroff/reboot needed).",
+ (fw_state & RENESAS_FW_STATUS_RESULT) >> 4);
return -EINVAL;
}
}
@@ -514,7 +538,8 @@ static int renesas_fw_download(struct pci_dev *pdev,
* 0. Set "FW Download Enable" bit in the
* "FW Download Control & Status Register" at 0xF4
*/
- err = pci_write_config_byte(pdev, 0xF4, BIT(0));
+ err = pci_write_config_byte(pdev, RENESAS_FW_STATUS,
+ RENESAS_FW_STATUS_DOWNLOAD_ENABLE);
if (err)
return pcibios_err_to_errno(err);

@@ -535,7 +560,8 @@ static int renesas_fw_download(struct pci_dev *pdev,
* is cleared by the hardware beforehand.
*/
for (i = 0; i < RENESAS_RETRY; i++) {
- err = pci_read_config_byte(pdev, 0xF5, &fw_status);
+ err = pci_read_config_byte(pdev, RENESAS_FW_STATUS_MSB,
+ &fw_status);
if (err)
return pcibios_err_to_errno(err);
if (!(fw_status & (BIT(0) | BIT(1))))
@@ -550,16 +576,16 @@ static int renesas_fw_download(struct pci_dev *pdev,
* 11. After finishing writing the last data of FW, the
* System Software must clear "FW Download Enable"
*/
- err = pci_write_config_byte(pdev, 0xF4, 0);
+ err = pci_write_config_byte(pdev, RENESAS_FW_STATUS, 0);
if (err)
return pcibios_err_to_errno(err);

/* 12. Read "Result Code" and confirm it is good. */
for (i = 0; i < RENESAS_RETRY; i++) {
- err = pci_read_config_byte(pdev, 0xF4, &fw_status);
+ err = pci_read_config_byte(pdev, RENESAS_FW_STATUS, &fw_status);
if (err)
return pcibios_err_to_errno(err);
- if (fw_status & BIT(4))
+ if (fw_status & RENESAS_FW_STATUS_SUCCESS)
break;

udelay(RENESAS_DELAY);
--
2.20.1
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