[PATCH V3 4/4] serial: 8250_pci: Remove Fintek F81504/508/512 UART driver
From: Peter Hung
Date: Tue Feb 16 2016 - 01:56:49 EST
Remove Fintek F81504/508/512 PCIE-to-UART device driver from 8250_pci.c
Paul recommed us do less code deletion to avoid confusing problem when
bisect.
https://lkml.org/lkml/2016/1/18/646
But this patch is sent after with following patch.
8250: 8250_f81504: Add Fintek F81504/508/512 PCIE-to-UART/GPIO UART support
mfd: f81504-core: Add Fintek F81504/508/512 PCIE-to-UART/GPIO core support
We must remove F81504/508/512 support in 8250_pci.c and migrate to
f81504-core/8250_f81504 to enable MFD support and Andy recommend me to
add these this in blacklist to avoid probed by 8250_pci.c
Suggested-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Hung <hpeter+linux_kernel@xxxxxxxxx>
---
drivers/tty/serial/8250/8250_pci.c | 206 +------------------------------------
1 file changed, 5 insertions(+), 201 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index e71ec78..24a669c 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1532,156 +1532,6 @@ pci_brcm_trumanage_setup(struct serial_private *priv,
return ret;
}
-/* RTS will control by MCR if this bit is 0 */
-#define FINTEK_RTS_CONTROL_BY_HW BIT(4)
-/* only worked with FINTEK_RTS_CONTROL_BY_HW on */
-#define FINTEK_RTS_INVERT BIT(5)
-
-/* We should do proper H/W transceiver setting before change to RS485 mode */
-static int pci_fintek_rs485_config(struct uart_port *port,
- struct serial_rs485 *rs485)
-{
- u8 setting;
- u8 *index = (u8 *) port->private_data;
- struct pci_dev *pci_dev = container_of(port->dev, struct pci_dev,
- dev);
-
- pci_read_config_byte(pci_dev, 0x40 + 8 * *index + 7, &setting);
-
- if (!rs485)
- rs485 = &port->rs485;
- else if (rs485->flags & SER_RS485_ENABLED)
- memset(rs485->padding, 0, sizeof(rs485->padding));
- else
- memset(rs485, 0, sizeof(*rs485));
-
- /* F81504/508/512 not support RTS delay before or after send */
- rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND;
-
- if (rs485->flags & SER_RS485_ENABLED) {
- /* Enable RTS H/W control mode */
- setting |= FINTEK_RTS_CONTROL_BY_HW;
-
- if (rs485->flags & SER_RS485_RTS_ON_SEND) {
- /* RTS driving high on TX */
- setting &= ~FINTEK_RTS_INVERT;
- } else {
- /* RTS driving low on TX */
- setting |= FINTEK_RTS_INVERT;
- }
-
- rs485->delay_rts_after_send = 0;
- rs485->delay_rts_before_send = 0;
- } else {
- /* Disable RTS H/W control mode */
- setting &= ~(FINTEK_RTS_CONTROL_BY_HW | FINTEK_RTS_INVERT);
- }
-
- pci_write_config_byte(pci_dev, 0x40 + 8 * *index + 7, setting);
-
- if (rs485 != &port->rs485)
- port->rs485 = *rs485;
-
- return 0;
-}
-
-static int pci_fintek_setup(struct serial_private *priv,
- const struct pciserial_board *board,
- struct uart_8250_port *port, int idx)
-{
- struct pci_dev *pdev = priv->dev;
- u8 *data;
- u8 config_base;
- u16 iobase;
-
- config_base = 0x40 + 0x08 * idx;
-
- /* Get the io address from configuration space */
- pci_read_config_word(pdev, config_base + 4, &iobase);
-
- dev_dbg(&pdev->dev, "%s: idx=%d iobase=0x%x", __func__, idx, iobase);
-
- port->port.iotype = UPIO_PORT;
- port->port.iobase = iobase;
- port->port.rs485_config = pci_fintek_rs485_config;
-
- data = devm_kzalloc(&pdev->dev, sizeof(u8), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- /* preserve index in PCI configuration space */
- *data = idx;
- port->port.private_data = data;
-
- return 0;
-}
-
-static int pci_fintek_init(struct pci_dev *dev)
-{
- unsigned long iobase;
- u32 max_port, i;
- u32 bar_data[3];
- u8 config_base;
- struct serial_private *priv = pci_get_drvdata(dev);
- struct uart_8250_port *port;
-
- switch (dev->device) {
- case 0x1104: /* 4 ports */
- case 0x1108: /* 8 ports */
- max_port = dev->device & 0xff;
- break;
- case 0x1112: /* 12 ports */
- max_port = 12;
- break;
- default:
- return -EINVAL;
- }
-
- /* Get the io address dispatch from the BIOS */
- pci_read_config_dword(dev, 0x24, &bar_data[0]);
- pci_read_config_dword(dev, 0x20, &bar_data[1]);
- pci_read_config_dword(dev, 0x1c, &bar_data[2]);
-
- for (i = 0; i < max_port; ++i) {
- /* UART0 configuration offset start from 0x40 */
- config_base = 0x40 + 0x08 * i;
-
- /* Calculate Real IO Port */
- iobase = (bar_data[i / 4] & 0xffffffe0) + (i % 4) * 8;
-
- /* Enable UART I/O port */
- pci_write_config_byte(dev, config_base + 0x00, 0x01);
-
- /* Select 128-byte FIFO and 8x FIFO threshold */
- pci_write_config_byte(dev, config_base + 0x01, 0x33);
-
- /* LSB UART */
- pci_write_config_byte(dev, config_base + 0x04,
- (u8)(iobase & 0xff));
-
- /* MSB UART */
- pci_write_config_byte(dev, config_base + 0x05,
- (u8)((iobase & 0xff00) >> 8));
-
- pci_write_config_byte(dev, config_base + 0x06, dev->irq);
-
- if (priv) {
- /* re-apply RS232/485 mode when
- * pciserial_resume_ports()
- */
- port = serial8250_get_port(priv->line[i]);
- pci_fintek_rs485_config(&port->port, NULL);
- } else {
- /* First init without port data
- * force init to RS232 Mode
- */
- pci_write_config_byte(dev, config_base + 0x07, 0x01);
- }
- }
-
- return max_port;
-}
-
static int skip_tx_en_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
@@ -2726,31 +2576,6 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.subdevice = PCI_ANY_ID,
.setup = pci_brcm_trumanage_setup,
},
- {
- .vendor = 0x1c29,
- .device = 0x1104,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_fintek_setup,
- .init = pci_fintek_init,
- },
- {
- .vendor = 0x1c29,
- .device = 0x1108,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_fintek_setup,
- .init = pci_fintek_init,
- },
- {
- .vendor = 0x1c29,
- .device = 0x1112,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_fintek_setup,
- .init = pci_fintek_init,
- },
-
/*
* Default "match everything" terminator entry
*/
@@ -2952,9 +2777,6 @@ enum pci_board_num_t {
pbn_omegapci,
pbn_NETMOS9900_2s_115200,
pbn_brcm_trumanage,
- pbn_fintek_4,
- pbn_fintek_8,
- pbn_fintek_12,
pbn_wch384_4,
pbn_pericom_PI7C9X7951,
pbn_pericom_PI7C9X7952,
@@ -3757,24 +3579,6 @@ static struct pciserial_board pci_boards[] = {
.reg_shift = 2,
.base_baud = 115200,
},
- [pbn_fintek_4] = {
- .num_ports = 4,
- .uart_offset = 8,
- .base_baud = 115200,
- .first_offset = 0x40,
- },
- [pbn_fintek_8] = {
- .num_ports = 8,
- .uart_offset = 8,
- .base_baud = 115200,
- .first_offset = 0x40,
- },
- [pbn_fintek_12] = {
- .num_ports = 12,
- .uart_offset = 8,
- .base_baud = 115200,
- .first_offset = 0x40,
- },
[pbn_wch384_4] = {
.flags = FL_BASE0,
.num_ports = 4,
@@ -3829,6 +3633,11 @@ static const struct pci_device_id blacklist[] = {
{ PCI_VDEVICE(INTEL, 0x081d), },
{ PCI_VDEVICE(INTEL, 0x1191), },
{ PCI_VDEVICE(INTEL, 0x19d8), },
+
+ /* Fintek F81504/508/512. It'll handle by MFD f81504-core.c */
+ { PCI_DEVICE(0x1c29, 0x1104), },
+ { PCI_DEVICE(0x1c29, 0x1108), },
+ { PCI_DEVICE(0x1c29, 0x1112), },
};
/*
@@ -5610,11 +5419,6 @@ static struct pci_device_id serial_pci_tbl[] = {
0,
0, pbn_exar_XR17V358 },
- /* Fintek PCI serial cards */
- { PCI_DEVICE(0x1c29, 0x1104), .driver_data = pbn_fintek_4 },
- { PCI_DEVICE(0x1c29, 0x1108), .driver_data = pbn_fintek_8 },
- { PCI_DEVICE(0x1c29, 0x1112), .driver_data = pbn_fintek_12 },
-
/*
* These entries match devices with class COMMUNICATION_SERIAL,
* COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
--
1.9.1