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openwrt_archive/target/linux/adm5120/patches-3.3/200-amba_pl010_hacks.patch
Gabor Juhos 647d5a5172 adm5120: add 3.3 support 
Partially based on the 3.1 patches by Hartmut Knaack <knaack.h [at] gmx.de>

SVN-Revision: 31474
2012-04-25 12:57:33 +00:00

379 lines
13 KiB
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--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -49,11 +49,10 @@
#include <asm/io.h>
-#define UART_NR 8
-
#define SERIAL_AMBA_MAJOR 204
#define SERIAL_AMBA_MINOR 16
-#define SERIAL_AMBA_NR UART_NR
+#define SERIAL_AMBA_NR CONFIG_SERIAL_AMBA_PL010_NUMPORTS
+#define SERIAL_AMBA_NAME CONFIG_SERIAL_AMBA_PL010_PORTNAME
#define AMBA_ISR_PASS_LIMIT 256
@@ -79,9 +78,9 @@ static void pl010_stop_tx(struct uart_po
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = __raw_readl(uap->port.membase + UART010_CR);
cr &= ~UART010_CR_TIE;
- writel(cr, uap->port.membase + UART010_CR);
+ __raw_writel(cr, uap->port.membase + UART010_CR);
}
static void pl010_start_tx(struct uart_port *port)
@@ -89,9 +88,9 @@ static void pl010_start_tx(struct uart_p
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = __raw_readl(uap->port.membase + UART010_CR);
cr |= UART010_CR_TIE;
- writel(cr, uap->port.membase + UART010_CR);
+ __raw_writel(cr, uap->port.membase + UART010_CR);
}
static void pl010_stop_rx(struct uart_port *port)
@@ -99,9 +98,9 @@ static void pl010_stop_rx(struct uart_po
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = __raw_readl(uap->port.membase + UART010_CR);
cr &= ~(UART010_CR_RIE | UART010_CR_RTIE);
- writel(cr, uap->port.membase + UART010_CR);
+ __raw_writel(cr, uap->port.membase + UART010_CR);
}
static void pl010_enable_ms(struct uart_port *port)
@@ -109,9 +108,9 @@ static void pl010_enable_ms(struct uart_
struct uart_amba_port *uap = (struct uart_amba_port *)port;
unsigned int cr;
- cr = readb(uap->port.membase + UART010_CR);
+ cr = __raw_readl(uap->port.membase + UART010_CR);
cr |= UART010_CR_MSIE;
- writel(cr, uap->port.membase + UART010_CR);
+ __raw_writel(cr, uap->port.membase + UART010_CR);
}
static void pl010_rx_chars(struct uart_amba_port *uap)
@@ -119,9 +118,9 @@ static void pl010_rx_chars(struct uart_a
struct tty_struct *tty = uap->port.state->port.tty;
unsigned int status, ch, flag, rsr, max_count = 256;
- status = readb(uap->port.membase + UART01x_FR);
+ status = __raw_readl(uap->port.membase + UART01x_FR);
while (UART_RX_DATA(status) && max_count--) {
- ch = readb(uap->port.membase + UART01x_DR);
+ ch = __raw_readl(uap->port.membase + UART01x_DR);
flag = TTY_NORMAL;
uap->port.icount.rx++;
@@ -130,9 +129,9 @@ static void pl010_rx_chars(struct uart_a
* Note that the error handling code is
* out of the main execution path
*/
- rsr = readb(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
+ rsr = __raw_readl(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
if (unlikely(rsr & UART01x_RSR_ANY)) {
- writel(0, uap->port.membase + UART01x_ECR);
+ __raw_writel(0, uap->port.membase + UART01x_ECR);
if (rsr & UART01x_RSR_BE) {
rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE);
@@ -162,7 +161,7 @@ static void pl010_rx_chars(struct uart_a
uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag);
ignore_char:
- status = readb(uap->port.membase + UART01x_FR);
+ status = __raw_readl(uap->port.membase + UART01x_FR);
}
spin_unlock(&uap->port.lock);
tty_flip_buffer_push(tty);
@@ -175,7 +174,7 @@ static void pl010_tx_chars(struct uart_a
int count;
if (uap->port.x_char) {
- writel(uap->port.x_char, uap->port.membase + UART01x_DR);
+ __raw_writel(uap->port.x_char, uap->port.membase + UART01x_DR);
uap->port.icount.tx++;
uap->port.x_char = 0;
return;
@@ -187,7 +186,7 @@ static void pl010_tx_chars(struct uart_a
count = uap->port.fifosize >> 1;
do {
- writel(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR);
+ __raw_writel(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
uap->port.icount.tx++;
if (uart_circ_empty(xmit))
@@ -205,9 +204,9 @@ static void pl010_modem_status(struct ua
{
unsigned int status, delta;
- writel(0, uap->port.membase + UART010_ICR);
+ __raw_writel(0, uap->port.membase + UART010_ICR);
- status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ status = __raw_readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
delta = status ^ uap->old_status;
uap->old_status = status;
@@ -235,7 +234,7 @@ static irqreturn_t pl010_int(int irq, vo
spin_lock(&uap->port.lock);
- status = readb(uap->port.membase + UART010_IIR);
+ status = __raw_readl(uap->port.membase + UART010_IIR);
if (status) {
do {
if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
@@ -248,7 +247,7 @@ static irqreturn_t pl010_int(int irq, vo
if (pass_counter-- == 0)
break;
- status = readb(uap->port.membase + UART010_IIR);
+ status = __raw_readl(uap->port.membase + UART010_IIR);
} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
UART010_IIR_TIS));
handled = 1;
@@ -262,7 +261,7 @@ static irqreturn_t pl010_int(int irq, vo
static unsigned int pl010_tx_empty(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
- unsigned int status = readb(uap->port.membase + UART01x_FR);
+ unsigned int status = __raw_readl(uap->port.membase + UART01x_FR);
return status & UART01x_FR_BUSY ? 0 : TIOCSER_TEMT;
}
@@ -272,7 +271,7 @@ static unsigned int pl010_get_mctrl(stru
unsigned int result = 0;
unsigned int status;
- status = readb(uap->port.membase + UART01x_FR);
+ status = __raw_readl(uap->port.membase + UART01x_FR);
if (status & UART01x_FR_DCD)
result |= TIOCM_CAR;
if (status & UART01x_FR_DSR)
@@ -298,12 +297,12 @@ static void pl010_break_ctl(struct uart_
unsigned int lcr_h;
spin_lock_irqsave(&uap->port.lock, flags);
- lcr_h = readb(uap->port.membase + UART010_LCRH);
+ lcr_h = __raw_readl(uap->port.membase + UART010_LCRH);
if (break_state == -1)
lcr_h |= UART01x_LCRH_BRK;
else
lcr_h &= ~UART01x_LCRH_BRK;
- writel(lcr_h, uap->port.membase + UART010_LCRH);
+ __raw_writel(lcr_h, uap->port.membase + UART010_LCRH);
spin_unlock_irqrestore(&uap->port.lock, flags);
}
@@ -335,12 +334,12 @@ static int pl010_startup(struct uart_por
/*
* initialise the old status of the modem signals
*/
- uap->old_status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ uap->old_status = __raw_readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
/*
* Finally, enable interrupts
*/
- writel(UART01x_CR_UARTEN | UART010_CR_RIE | UART010_CR_RTIE,
+ __raw_writel(UART01x_CR_UARTEN | UART010_CR_RIE | UART010_CR_RTIE,
uap->port.membase + UART010_CR);
return 0;
@@ -365,10 +364,10 @@ static void pl010_shutdown(struct uart_p
/*
* disable all interrupts, disable the port
*/
- writel(0, uap->port.membase + UART010_CR);
+ __raw_writel(0, uap->port.membase + UART010_CR);
/* disable break condition and fifos */
- writel(readb(uap->port.membase + UART010_LCRH) &
+ __raw_writel(__raw_readl(uap->port.membase + UART010_LCRH) &
~(UART01x_LCRH_BRK | UART01x_LCRH_FEN),
uap->port.membase + UART010_LCRH);
@@ -391,7 +390,7 @@ pl010_set_termios(struct uart_port *port
/*
* Ask the core to calculate the divisor for us.
*/
- baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
+ baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
quot = uart_get_divisor(port, baud);
switch (termios->c_cflag & CSIZE) {
@@ -454,25 +453,25 @@ pl010_set_termios(struct uart_port *port
uap->port.ignore_status_mask |= UART_DUMMY_RSR_RX;
/* first, disable everything */
- old_cr = readb(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
+ old_cr = __raw_readl(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
if (UART_ENABLE_MS(port, termios->c_cflag))
old_cr |= UART010_CR_MSIE;
- writel(0, uap->port.membase + UART010_CR);
+ __raw_writel(0, uap->port.membase + UART010_CR);
/* Set baud rate */
quot -= 1;
- writel((quot & 0xf00) >> 8, uap->port.membase + UART010_LCRM);
- writel(quot & 0xff, uap->port.membase + UART010_LCRL);
+ __raw_writel((quot & 0xf00) >> 8, uap->port.membase + UART010_LCRM);
+ __raw_writel(quot & 0xff, uap->port.membase + UART010_LCRL);
/*
* ----------v----------v----------v----------v-----
* NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L
* ----------^----------^----------^----------^-----
*/
- writel(lcr_h, uap->port.membase + UART010_LCRH);
- writel(old_cr, uap->port.membase + UART010_CR);
+ __raw_writel(lcr_h, uap->port.membase + UART010_LCRH);
+ __raw_writel(old_cr, uap->port.membase + UART010_CR);
spin_unlock_irqrestore(&uap->port.lock, flags);
}
@@ -554,7 +553,7 @@ static struct uart_ops amba_pl010_pops =
.verify_port = pl010_verify_port,
};
-static struct uart_amba_port *amba_ports[UART_NR];
+static struct uart_amba_port *amba_ports[SERIAL_AMBA_NR];
#ifdef CONFIG_SERIAL_AMBA_PL010_CONSOLE
@@ -564,10 +563,10 @@ static void pl010_console_putchar(struct
unsigned int status;
do {
- status = readb(uap->port.membase + UART01x_FR);
+ status = __raw_readl(uap->port.membase + UART01x_FR);
barrier();
} while (!UART_TX_READY(status));
- writel(ch, uap->port.membase + UART01x_DR);
+ __raw_writel(ch, uap->port.membase + UART01x_DR);
}
static void
@@ -581,8 +580,8 @@ pl010_console_write(struct console *co,
/*
* First save the CR then disable the interrupts
*/
- old_cr = readb(uap->port.membase + UART010_CR);
- writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
+ old_cr = __raw_readl(uap->port.membase + UART010_CR);
+ __raw_writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
uart_console_write(&uap->port, s, count, pl010_console_putchar);
@@ -591,10 +590,10 @@ pl010_console_write(struct console *co,
* and restore the TCR
*/
do {
- status = readb(uap->port.membase + UART01x_FR);
+ status = __raw_readl(uap->port.membase + UART01x_FR);
barrier();
} while (status & UART01x_FR_BUSY);
- writel(old_cr, uap->port.membase + UART010_CR);
+ __raw_writel(old_cr, uap->port.membase + UART010_CR);
clk_disable(uap->clk);
}
@@ -603,9 +602,9 @@ static void __init
pl010_console_get_options(struct uart_amba_port *uap, int *baud,
int *parity, int *bits)
{
- if (readb(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
+ if (__raw_readl(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
unsigned int lcr_h, quot;
- lcr_h = readb(uap->port.membase + UART010_LCRH);
+ lcr_h = __raw_readl(uap->port.membase + UART010_LCRH);
*parity = 'n';
if (lcr_h & UART01x_LCRH_PEN) {
@@ -620,8 +619,8 @@ pl010_console_get_options(struct uart_am
else
*bits = 8;
- quot = readb(uap->port.membase + UART010_LCRL) |
- readb(uap->port.membase + UART010_LCRM) << 8;
+ quot = __raw_readl(uap->port.membase + UART010_LCRL) |
+ __raw_readl(uap->port.membase + UART010_LCRM) << 8;
*baud = uap->port.uartclk / (16 * (quot + 1));
}
}
@@ -640,7 +639,7 @@ static int __init pl010_console_setup(st
* if so, search for the first available port that does have
* console support.
*/
- if (co->index >= UART_NR)
+ if (co->index >= SERIAL_AMBA_NR)
co->index = 0;
uap = amba_ports[co->index];
if (!uap)
@@ -662,7 +661,7 @@ static int __init pl010_console_setup(st
static struct uart_driver amba_reg;
static struct console amba_console = {
- .name = "ttyAM",
+ .name = SERIAL_AMBA_NAME,
.write = pl010_console_write,
.device = uart_console_device,
.setup = pl010_console_setup,
@@ -678,11 +677,11 @@ static struct console amba_console = {
static struct uart_driver amba_reg = {
.owner = THIS_MODULE,
- .driver_name = "ttyAM",
- .dev_name = "ttyAM",
+ .driver_name = SERIAL_AMBA_NAME,
+ .dev_name = SERIAL_AMBA_NAME,
.major = SERIAL_AMBA_MAJOR,
.minor = SERIAL_AMBA_MINOR,
- .nr = UART_NR,
+ .nr = SERIAL_AMBA_NR,
.cons = AMBA_CONSOLE,
};
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -16,10 +16,25 @@ config SERIAL_AMBA_PL010
help
This selects the ARM(R) AMBA(R) PrimeCell PL010 UART. If you have
an Integrator/AP or Integrator/PP2 platform, or if you have a
- Cirrus Logic EP93xx CPU, say Y or M here.
+ Cirrus Logic EP93xx CPU or an Infineon ADM5120 SOC, say Y or M here.
If unsure, say N.
+config SERIAL_AMBA_PL010_NUMPORTS
+ int "Maximum number of AMBA PL010 serial ports"
+ depends on SERIAL_AMBA_PL010
+ default "8"
+ ---help---
+ Set this to the number of serial ports you want the AMBA PL010 driver
+ to support.
+
+config SERIAL_AMBA_PL010_PORTNAME
+ string "Name of the AMBA PL010 serial ports"
+ depends on SERIAL_AMBA_PL010
+ default "ttyAM"
+ ---help---
+ ::: To be written :::
+
config SERIAL_AMBA_PL010_CONSOLE
bool "Support for console on AMBA serial port"
depends on SERIAL_AMBA_PL010=y
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