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serial: 8250_pci: Split out Pericom driver

Browse source 
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>
Link: https://lore.kernel.org/r/20211122133512.8947-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-11-22 15:35:10 +02:00 committed by Greg Kroah-Hartman
parent 8cf8d3c4a6
commit fcfd3c09f4
4 changed files with 228 additions and 400 deletions
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405
drivers/tty/serial/8250/8250_pci.c
View file

@ -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 = max(maxrate / baud, 1U);
int delta = maxrate / divisor - baud;
if (baud > maxrate + baud / 50)
continue;
if (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)
*/

214
drivers/tty/serial/8250/8250_pericom.c Normal file
View file

@ -0,0 +1,214 @@
// 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[];
};
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--) {
unsigned int maxrate = port->uartclk / scr;
unsigned int divisor = max(maxrate / baud, 1U);
int delta = maxrate / divisor - baud;
if (baud > maxrate + baud / 50)
continue;
if (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_PORT;
uart.port.uartclk = 921600 * 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.iobase = pci_resource_start(pdev, bar) + 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");

8
drivers/tty/serial/8250/Kconfig
View file

@ -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

1
drivers/tty/serial/8250/Makefile
View file

@ -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