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Subject[PATCH v1 1/2] serial: 8250_pci: Split out Pericom driver
Date
Pericom along with Acces I/O support consumes a lot of LOCs in 8250_pci.c.
For the sake of easier maintenance, split it to a separate driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/tty/serial/8250/8250_pci.c | 405 +------------------------
drivers/tty/serial/8250/8250_pericom.c | 217 +++++++++++++
drivers/tty/serial/8250/Kconfig | 8 +
drivers/tty/serial/8250/Makefile | 1 +
4 files changed, 231 insertions(+), 400 deletions(-)
create mode 100644 drivers/tty/serial/8250/8250_pericom.c

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 8b29a9381c74..f8d68db73db8 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1318,89 +1318,6 @@ static int pci_default_setup(struct serial_private *priv,

return setup_port(priv, port, bar, offset, board->reg_shift);
}
-static void
-pericom_do_set_divisor(struct uart_port *port, unsigned int baud,
- unsigned int quot, unsigned int quot_frac)
-{
- int scr;
- int lcr;
-
- for (scr = 16; scr > 4; scr--) {
- unsigned int maxrate = port->uartclk / scr;
- unsigned int divisor = maxrate / baud;
- int delta = maxrate / divisor - baud;
-
- if (baud > maxrate + baud / 50)
- continue;
-
- if (divisor == 0 || delta > baud / 50)
- divisor++;
-
- if (divisor > 0xffff)
- continue;
-
- /* Update delta due to possible divisor change */
- delta = maxrate / divisor - baud;
- if (abs(delta) < baud / 50) {
- lcr = serial_port_in(port, UART_LCR);
- serial_port_out(port, UART_LCR, lcr | 0x80);
- serial_port_out(port, UART_DLL, divisor & 0xff);
- serial_port_out(port, UART_DLM, divisor >> 8 & 0xff);
- serial_port_out(port, 2, 16 - scr);
- serial_port_out(port, UART_LCR, lcr);
- return;
- }
- }
-}
-static int pci_pericom_setup(struct serial_private *priv,
- const struct pciserial_board *board,
- struct uart_8250_port *port, int idx)
-{
- unsigned int bar, offset = board->first_offset, maxnr;
-
- bar = FL_GET_BASE(board->flags);
- if (board->flags & FL_BASE_BARS)
- bar += idx;
- else
- offset += idx * board->uart_offset;
-
-
- maxnr = (pci_resource_len(priv->dev, bar) - board->first_offset) >>
- (board->reg_shift + 3);
-
- if (board->flags & FL_REGION_SZ_CAP && idx >= maxnr)
- return 1;
-
- port->port.set_divisor = pericom_do_set_divisor;
-
- return setup_port(priv, port, bar, offset, board->reg_shift);
-}
-
-static int pci_pericom_setup_four_at_eight(struct serial_private *priv,
- const struct pciserial_board *board,
- struct uart_8250_port *port, int idx)
-{
- unsigned int bar, offset = board->first_offset, maxnr;
-
- bar = FL_GET_BASE(board->flags);
- if (board->flags & FL_BASE_BARS)
- bar += idx;
- else
- offset += idx * board->uart_offset;
-
- if (idx==3)
- offset = 0x38;
-
- maxnr = (pci_resource_len(priv->dev, bar) - board->first_offset) >>
- (board->reg_shift + 3);
-
- if (board->flags & FL_REGION_SZ_CAP && idx >= maxnr)
- return 1;
-
- port->port.set_divisor = pericom_do_set_divisor;
-
- return setup_port(priv, port, bar, offset, board->reg_shift);
-}

static int
ce4100_serial_setup(struct serial_private *priv,
@@ -1886,42 +1803,6 @@ pci_moxa_setup(struct serial_private *priv,
#define PCIE_DEVICE_ID_WCH_CH384_8S 0x3853
#define PCIE_DEVICE_ID_WCH_CH382_2S 0x3253

-#define PCI_VENDOR_ID_ACCESIO 0x494f
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB 0x1051
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S 0x1053
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB 0x105C
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S 0x105E
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB 0x1091
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2 0x1093
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB 0x1099
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4 0x109B
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB 0x10D1
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM 0x10D3
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB 0x10DA
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM 0x10DC
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1 0x1108
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2 0x1110
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2 0x1111
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4 0x1118
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4 0x1119
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S 0x1152
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S 0x115A
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2 0x1190
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2 0x1191
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4 0x1198
-#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4 0x1199
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM 0x11D0
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4 0x105A
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4 0x105B
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8 0x106A
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8 0x106B
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4 0x1098
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8 0x10A9
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM 0x10D9
-#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM 0x10E9
-#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM 0x11D8
-
-
#define PCI_DEVICE_ID_MOXA_CP102E 0x1024
#define PCI_DEVICE_ID_MOXA_CP102EL 0x1025
#define PCI_DEVICE_ID_MOXA_CP104EL_A 0x1045
@@ -2198,16 +2079,6 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
.setup = pci_default_setup,
.exit = pci_plx9050_exit,
},
- /*
- * Pericom (Only 7954 - It have a offset jump for port 4)
- */
- {
- .vendor = PCI_VENDOR_ID_PERICOM,
- .device = PCI_DEVICE_ID_PERICOM_PI7C9X7954,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
/*
* PLX
*/
@@ -2238,125 +2109,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
.setup = pci_default_setup,
.exit = pci_plx9050_exit,
},
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup_four_at_eight,
- },
- {
- .vendor = PCI_VENDOR_ID_ACCESIO,
- .device = PCI_ANY_ID,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_pericom_setup,
- }, /*
+ /*
* SBS Technologies, Inc., PMC-OCTALPRO 232
*/
{
@@ -2948,10 +2701,6 @@ enum pci_board_num_t {
pbn_wch382_2,
pbn_wch384_4,
pbn_wch384_8,
- pbn_pericom_PI7C9X7951,
- pbn_pericom_PI7C9X7952,
- pbn_pericom_PI7C9X7954,
- pbn_pericom_PI7C9X7958,
pbn_sunix_pci_1s,
pbn_sunix_pci_2s,
pbn_sunix_pci_4s,
@@ -3696,33 +3445,6 @@ static struct pciserial_board pci_boards[] = {
.uart_offset = 8,
.first_offset = 0x00,
},
- /*
- * Pericom PI7C9X795[1248] Uno/Dual/Quad/Octal UART
- */
- [pbn_pericom_PI7C9X7951] = {
- .flags = FL_BASE0,
- .num_ports = 1,
- .base_baud = 921600,
- .uart_offset = 0x8,
- },
- [pbn_pericom_PI7C9X7952] = {
- .flags = FL_BASE0,
- .num_ports = 2,
- .base_baud = 921600,
- .uart_offset = 0x8,
- },
- [pbn_pericom_PI7C9X7954] = {
- .flags = FL_BASE0,
- .num_ports = 4,
- .base_baud = 921600,
- .uart_offset = 0x8,
- },
- [pbn_pericom_PI7C9X7958] = {
- .flags = FL_BASE0,
- .num_ports = 8,
- .base_baud = 921600,
- .uart_offset = 0x8,
- },
[pbn_sunix_pci_1s] = {
.num_ports = 1,
.base_baud = 921600,
@@ -3834,6 +3556,10 @@ static const struct pci_device_id blacklist[] = {
{ PCI_VDEVICE(EXAR, PCI_ANY_ID), },
{ PCI_VDEVICE(COMMTECH, PCI_ANY_ID), },

+ /* Pericom devices */
+ { PCI_VDEVICE(PERICOM, PCI_ANY_ID), },
+ { PCI_VDEVICE(ACCESSIO, PCI_ANY_ID), },
+
/* End of the black list */
{ }
};
@@ -5027,127 +4753,6 @@ static const struct pci_device_id serial_pci_tbl[] = {
{ PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM8,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b3_8_115200 },
- /*
- * Pericom PI7C9X795[1248] Uno/Dual/Quad/Octal UART
- */
- { PCI_VENDOR_ID_PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7951,
- PCI_ANY_ID, PCI_ANY_ID,
- 0,
- 0, pbn_pericom_PI7C9X7951 },
- { PCI_VENDOR_ID_PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7952,
- PCI_ANY_ID, PCI_ANY_ID,
- 0,
- 0, pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7954,
- PCI_ANY_ID, PCI_ANY_ID,
- 0,
- 0, pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7958,
- PCI_ANY_ID, PCI_ANY_ID,
- 0,
- 0, pbn_pericom_PI7C9X7958 },
- /*
- * ACCES I/O Products quad
- */
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7951 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7952 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7958 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7958 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7958 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7958 },
- { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- pbn_pericom_PI7C9X7954 },
/*
* Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke)
*/
diff --git a/drivers/tty/serial/8250/8250_pericom.c b/drivers/tty/serial/8250/8250_pericom.c
new file mode 100644
index 000000000000..322c3b743a38
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_pericom.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for Pericom UART */
+
+#include <linux/bits.h>
+#include <linux/module.h>
+#include <linux/overflow.h>
+#include <linux/pci.h>
+
+#include "8250.h"
+
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SDB 0x1051
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2S 0x1053
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_4 0x105a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_4 0x105b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SDB 0x105c
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4S 0x105e
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_8 0x106a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_8 0x106b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_2DB 0x1091
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_2 0x1093
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4 0x1098
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4DB 0x1099
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_4 0x109b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_8 0x10a9
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SMDB 0x10d1
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2SM 0x10d3
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SM 0x10d9
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SMDB 0x10da
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4SM 0x10dc
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_8SM 0x10e9
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_1 0x1108
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_2 0x1110
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_2 0x1111
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_4 0x1118
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_4 0x1119
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2S 0x1152
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4S 0x115a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_2 0x1190
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_2 0x1191
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_4 0x1198
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_4 0x1199
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2SM 0x11d0
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4SM 0x11d8
+
+struct pericom8250 {
+ void __iomem *virt;
+ unsigned int nr;
+ int line[];
+};
+
+#define PERICOM8250_DEFAUL_BAUD_RATE 921600
+
+static void pericom_do_set_divisor(struct uart_port *port, unsigned int baud,
+ unsigned int quot, unsigned int quot_frac)
+{
+ int scr;
+
+ for (scr = 16 ; scr > 4 ; scr--) {
+ int maxrate = port->uartclk / scr;
+ int divisor = maxrate / baud;
+ int delta = maxrate / divisor - baud;
+
+ if (baud > maxrate + baud / 50)
+ continue;
+
+ if (divisor == 0 || delta > baud / 50)
+ divisor++;
+
+ if (divisor > 0xffff)
+ continue;
+
+ /* Update delta due to possible divisor change */
+ delta = maxrate / divisor - baud;
+ if (abs(delta) < baud / 50) {
+ int lcr = serial_port_in(port, UART_LCR);
+
+ serial_port_out(port, UART_LCR, lcr | 0x80);
+ serial_port_out(port, UART_DLL, divisor & 0xff);
+ serial_port_out(port, UART_DLM, (divisor >> 8) & 0xff);
+ serial_port_out(port, 2, 16 - scr);
+ serial_port_out(port, UART_LCR, lcr);
+ return;
+ }
+ }
+}
+
+static int pericom8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ unsigned int nr, i, bar = 0, maxnr;
+ struct pericom8250 *pericom;
+ struct uart_8250_port uart;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ maxnr = pci_resource_len(pdev, bar) >> 3;
+
+ if (pdev->vendor == PCI_VENDOR_ID_PERICOM)
+ nr = pdev->device & 0x0f;
+ else if (pdev->vendor == PCI_VENDOR_ID_ACCESSIO)
+ nr = BIT(((pdev->device & 0x38) >> 3) - 1);
+ else
+ nr = 1;
+
+ pericom = devm_kzalloc(&pdev->dev, struct_size(pericom, line, nr), GFP_KERNEL);
+ if (!pericom)
+ return -ENOMEM;
+
+ pericom->virt = pcim_iomap(pdev, bar, 0);
+ if (!pericom->virt)
+ return -ENOMEM;
+
+ memset(&uart, 0, sizeof(uart));
+
+ uart.port.dev = &pdev->dev;
+ uart.port.irq = pdev->irq;
+ uart.port.private_data = pericom;
+ uart.port.iotype = UPIO_MEM;
+ uart.port.uartclk = PERICOM8250_DEFAUL_BAUD_RATE * 16;
+ uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+ uart.port.set_divisor = pericom_do_set_divisor;
+ for (i = 0; i < nr && i < maxnr; i++) {
+ unsigned int offset = (i == 3 && nr == 4) ? 0x38 : i * 0x8;
+
+ uart.port.mapbase = pci_resource_start(pdev, bar) + offset;
+ uart.port.membase = pericom->virt + offset;
+
+ dev_dbg(&pdev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
+ uart.port.iobase, uart.port.irq, uart.port.iotype);
+
+ pericom->line[i] = serial8250_register_8250_port(&uart);
+ if (pericom->line[i] < 0) {
+ dev_err(&pdev->dev,
+ "Couldn't register serial port %lx, irq %d, type %d, error %d\n",
+ uart.port.iobase, uart.port.irq,
+ uart.port.iotype, pericom->line[i]);
+ break;
+ }
+ }
+ pericom->nr = i;
+
+ pci_set_drvdata(pdev, pericom);
+ return 0;
+}
+
+static void pericom8250_remove(struct pci_dev *pdev)
+{
+ struct pericom8250 *pericom = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < pericom->nr; i++)
+ serial8250_unregister_port(pericom->line[i]);
+}
+
+static const struct pci_device_id pericom8250_pci_ids[] = {
+ /*
+ * Pericom PI7C9X795[1248] Uno/Dual/Quad/Octal UART
+ * (Only 7954 has an offset jump for port 4)
+ */
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7951) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7952) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7954) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7958) },
+
+ /*
+ * ACCES I/O Products quad
+ * (Only 7954 has an offset jump for port 4)
+ */
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_2DB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4DB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SMDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SMDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_8SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_1) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4SM) },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, pericom8250_pci_ids);
+
+static struct pci_driver pericom8250_pci_driver = {
+ .name = "8250_pericom",
+ .id_table = pericom8250_pci_ids,
+ .probe = pericom8250_probe,
+ .remove = pericom8250_remove,
+};
+module_pci_driver(pericom8250_pci_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Pericom UART driver");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 8cd11aa63ed5..9d415a38cc71 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -498,6 +498,14 @@ config SERIAL_8250_MID
present on the UART found on Intel Medfield SOC and various other
Intel platforms.

+config SERIAL_8250_PERICOM
+ tristate "Support for Pericom and Acces I/O serial ports"
+ default SERIAL_8250
+ depends on SERIAL_8250 && PCI
+ help
+ Selecting this option will enable handling of the extra features
+ present on the Pericom and Acces I/O UARTs.
+
config SERIAL_8250_PXA
tristate "PXA serial port support"
depends on SERIAL_8250
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index b9bcd73c8997..4e4913e0e4d2 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_SERIAL_8250_UNIPHIER) += 8250_uniphier.o
obj-$(CONFIG_SERIAL_8250_INGENIC) += 8250_ingenic.o
obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o
obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o
+obj-$(CONFIG_SERIAL_8250_PERICOM) += 8250_pericom.o
obj-$(CONFIG_SERIAL_8250_PXA) += 8250_pxa.o
obj-$(CONFIG_SERIAL_8250_TEGRA) += 8250_tegra.o
obj-$(CONFIG_SERIAL_8250_BCM7271) += 8250_bcm7271.o
--
2.33.0
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