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serial: pch_uart: support new device ML7213

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Support ML7213 device of OKI SEMICONDUCTOR.
ML7213 is companion chip of Intel Atom E6xx series for IVI(In-Vehicle Infotainment).
ML7213 is completely compatible for Intel EG20T PCH.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tomoya MORINAGA 2011-01-28 18:00:01 +09:00 • committed by Greg Kroah-Hartman
parent f094298bae
commit 4564e1ef21
2 changed files with 24 additions and 8 deletions
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5
drivers/tty/serial/Kconfig
View file

@ -1596,4 +1596,9 @@ config SERIAL_PCH_UART
This driver is for PCH(Platform controller Hub) UART of Intel EG20T This driver is for PCH(Platform controller Hub) UART of Intel EG20T
which is an IOH(Input/Output Hub) for x86 embedded processor. which is an IOH(Input/Output Hub) for x86 embedded processor.
Enabling PCH_DMA, this PCH UART works as DMA mode. Enabling PCH_DMA, this PCH UART works as DMA mode.
This driver also can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/
Output Hub) which is for IVI(In-Vehicle Infotainment) use.
ML7213 is companion chip for Intel Atom E6xx series.
ML7213 is completely compatible for Intel EG20T PCH.
endmenu endmenu

27
drivers/tty/serial/pch_uart.c
View file

@ -40,10 +40,11 @@ enum {
#define PCH_UART_DRIVER_DEVICE "ttyPCH" #define PCH_UART_DRIVER_DEVICE "ttyPCH"
#define PCH_UART_NR_GE_256FIFO 1 /* Set the max number of UART port
#define PCH_UART_NR_GE_64FIFO 3 * Intel EG20T PCH: 4 port
#define PCH_UART_NR_GE (PCH_UART_NR_GE_256FIFO+PCH_UART_NR_GE_64FIFO) * OKI SEMICONDUCTOR ML7213 IOH: 3 port
#define PCH_UART_NR PCH_UART_NR_GE */
#define PCH_UART_NR 4
#define PCH_UART_HANDLED_RX_INT (1<<((PCH_UART_HANDLED_RX_INT_SHIFT)<<1)) #define PCH_UART_HANDLED_RX_INT (1<<((PCH_UART_HANDLED_RX_INT_SHIFT)<<1))
#define PCH_UART_HANDLED_TX_INT (1<<((PCH_UART_HANDLED_TX_INT_SHIFT)<<1)) #define PCH_UART_HANDLED_TX_INT (1<<((PCH_UART_HANDLED_TX_INT_SHIFT)<<1))
@ -192,6 +193,8 @@ enum {
#define PCH_UART_HAL_LOOP (PCH_UART_MCR_LOOP) #define PCH_UART_HAL_LOOP (PCH_UART_MCR_LOOP)
#define PCH_UART_HAL_AFE (PCH_UART_MCR_AFE) #define PCH_UART_HAL_AFE (PCH_UART_MCR_AFE)
#define PCI_VENDOR_ID_ROHM 0x10DB
struct pch_uart_buffer { struct pch_uart_buffer {
unsigned char *buf; unsigned char *buf;
int size; int size;
@ -1249,7 +1252,7 @@ static struct uart_driver pch_uart_driver = {
}; };
static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
int port_type) const struct pci_device_id *id)
{ {
struct eg20t_port *priv; struct eg20t_port *priv;
int ret; int ret;
@ -1258,6 +1261,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
unsigned char *rxbuf; unsigned char *rxbuf;
int fifosize, base_baud; int fifosize, base_baud;
static int num; static int num;
int port_type = id->driver_data;
priv = kzalloc(sizeof(struct eg20t_port), GFP_KERNEL); priv = kzalloc(sizeof(struct eg20t_port), GFP_KERNEL);
if (priv == NULL) if (priv == NULL)
@ -1269,11 +1273,11 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
switch (port_type) { switch (port_type) {
case PORT_UNKNOWN: case PORT_UNKNOWN:
fifosize = 256; /* UART0 */ fifosize = 256; /* EG20T/ML7213: UART0 */
base_baud = 1843200; /* 1.8432MHz */ base_baud = 1843200; /* 1.8432MHz */
break; break;
case PORT_8250: case PORT_8250:
fifosize = 64; /* UART1~3 */ fifosize = 64; /* EG20T:UART1~3 ML7213: UART1~2*/
base_baud = 1843200; /* 1.8432MHz */ base_baud = 1843200; /* 1.8432MHz */
break; break;
default: default:
@ -1307,6 +1311,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
pci_set_drvdata(pdev, priv); pci_set_drvdata(pdev, priv);
pch_uart_hal_request(pdev, fifosize, base_baud); pch_uart_hal_request(pdev, fifosize, base_baud);
ret = uart_add_one_port(&pch_uart_driver, &priv->port); ret = uart_add_one_port(&pch_uart_driver, &priv->port);
if (ret < 0) if (ret < 0)
goto init_port_hal_free; goto init_port_hal_free;
@ -1384,6 +1389,12 @@ static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = {
.driver_data = PCH_UART_2LINE}, .driver_data = PCH_UART_2LINE},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8814), {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8814),
.driver_data = PCH_UART_2LINE}, .driver_data = PCH_UART_2LINE},
{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8027),
.driver_data = PCH_UART_8LINE},
{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8028),
.driver_data = PCH_UART_2LINE},
{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8029),
.driver_data = PCH_UART_2LINE},
{0,}, {0,},
}; };
@ -1397,7 +1408,7 @@ static int __devinit pch_uart_pci_probe(struct pci_dev *pdev,
if (ret < 0) if (ret < 0)
goto probe_error; goto probe_error;
priv = pch_uart_init_port(pdev, id->driver_data); priv = pch_uart_init_port(pdev, id);
if (!priv) { if (!priv) {
ret = -EBUSY; ret = -EBUSY;
goto probe_disable_device; goto probe_disable_device;