Commit fcfd3c09 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman
Browse files

serial: 8250_pci: Split out Pericom driver 



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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211122133512.8947-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8cf8d3c4

drivers/tty/serial/8250/8250_pci.c

+5 −400
Original line number Diff line number Diff line
@@ -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)

	 */

drivers/tty/serial/8250/8250_pericom.c

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// 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");

drivers/tty/serial/8250/Kconfig

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@@ -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

drivers/tty/serial/8250/Makefile

+1 −0
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@@ -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