* (C) Copyright 2004-2009
* DENX Software Engineering
* Wolfgang Denk, wd@denx.de
- * All rights reserved.
*
* Simple 16550A serial driver
*
#define PS2SER_BAUD 57600
-#ifdef CONFIG_MPC5xxx
-#if CONFIG_PS2SERIAL == 1
-#define PSC_BASE MPC5XXX_PSC1
-#elif CONFIG_PS2SERIAL == 2
-#define PSC_BASE MPC5XXX_PSC2
-#elif CONFIG_PS2SERIAL == 3
-#define PSC_BASE MPC5XXX_PSC3
-#elif defined(CONFIG_MGT5100)
-#error CONFIG_PS2SERIAL must be in 1, 2 or 3
-#elif CONFIG_PS2SERIAL == 4
-#define PSC_BASE MPC5XXX_PSC4
-#elif CONFIG_PS2SERIAL == 5
-#define PSC_BASE MPC5XXX_PSC5
-#elif CONFIG_PS2SERIAL == 6
-#define PSC_BASE MPC5XXX_PSC6
-#else
-#error CONFIG_PS2SERIAL must be in 1 ... 6
-#endif
-
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
-
#if CONFIG_PS2SERIAL == 1
#define COM_BASE (CONFIG_SYS_CCSRBAR+0x4500)
#elif CONFIG_PS2SERIAL == 2
#error CONFIG_PS2SERIAL must be in 1 ... 2
#endif
-#endif /* CONFIG_MPC5xxx / CONFIG_MPC8540 / other */
-
static int ps2ser_getc_hw(void);
static void ps2ser_interrupt(void *dev_id);
extern struct serial_state rs_table[]; /* in serial.c */
-#if !defined(CONFIG_MPC5xxx) && !defined(CONFIG_MPC8540) && \
- !defined(CONFIG_MPC8541) && !defined(CONFIG_MPC8548) && \
- !defined(CONFIG_MPC8555)
-static struct serial_state *state;
-#endif
static u_char ps2buf[PS2BUF_SIZE];
static atomic_t ps2buf_cnt;
static int ps2buf_in_idx;
static int ps2buf_out_idx;
-#ifdef CONFIG_MPC5xxx
-int ps2ser_init(void)
-{
- volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
- unsigned long baseclk;
- int div;
-
- /* reset PSC */
- psc->command = PSC_SEL_MODE_REG_1;
-
- /* select clock sources */
-#if defined(CONFIG_MGT5100)
- psc->psc_clock_select = 0xdd00;
- baseclk = (CONFIG_SYS_MPC5XXX_CLKIN + 16) / 32;
-#elif defined(CONFIG_MPC5200)
- psc->psc_clock_select = 0;
- baseclk = (gd->ipb_clk + 16) / 32;
-#endif
-
- /* switch to UART mode */
- psc->sicr = 0;
-
- /* configure parity, bit length and so on */
-#if defined(CONFIG_MGT5100)
- psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
-#elif defined(CONFIG_MPC5200)
- psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
-#endif
- psc->mode = PSC_MODE_ONE_STOP;
-
- /* set up UART divisor */
- div = (baseclk + (PS2SER_BAUD/2)) / PS2SER_BAUD;
- psc->ctur = (div >> 8) & 0xff;
- psc->ctlr = div & 0xff;
-
- /* disable all interrupts */
- psc->psc_imr = 0;
-
- /* reset and enable Rx/Tx */
- psc->command = PSC_RST_RX;
- psc->command = PSC_RST_TX;
- psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
-
- return (0);
-}
-
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
int ps2ser_init(void)
{
NS16550_t com_port = (NS16550_t)COM_BASE;
return (0);
}
-#else /* !CONFIG_MPC5xxx && !CONFIG_MPC8540 / other */
-
-static inline unsigned int ps2ser_in(int offset)
-{
- return readb((unsigned long) state->iomem_base + offset);
-}
-
-static inline void ps2ser_out(int offset, int value)
-{
- writeb(value, (unsigned long) state->iomem_base + offset);
-}
-
-int ps2ser_init(void)
-{
- int quot;
- unsigned cval;
-
- state = rs_table + CONFIG_PS2SERIAL;
-
- quot = state->baud_base / PS2SER_BAUD;
- cval = 0x3; /* 8N1 - 8 data bits, no parity bits, 1 stop bit */
-
- /* Set speed, enable interrupts, enable FIFO
- */
- ps2ser_out(UART_LCR, cval | UART_LCR_DLAB);
- ps2ser_out(UART_DLL, quot & 0xff);
- ps2ser_out(UART_DLM, quot >> 8);
- ps2ser_out(UART_LCR, cval);
- ps2ser_out(UART_IER, UART_IER_RDI);
- ps2ser_out(UART_MCR, UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS);
- ps2ser_out(UART_FCR,
- UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
-
- /* If we read 0xff from the LSR, there is no UART here
- */
- if (ps2ser_in(UART_LSR) == 0xff) {
- printf ("ps2ser.c: no UART found\n");
- return -1;
- }
-
- irq_install_handler(state->irq, ps2ser_interrupt, NULL);
-
- return 0;
-}
-#endif /* CONFIG_MPC5xxx / CONFIG_MPC8540 / other */
-
void ps2ser_putc(int chr)
{
-#ifdef CONFIG_MPC5xxx
- volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
NS16550_t com_port = (NS16550_t)COM_BASE;
-#endif
-#ifdef DEBUG
- printf(">>>> 0x%02x\n", chr);
-#endif
+ debug(">>>> 0x%02x\n", chr);
-#ifdef CONFIG_MPC5xxx
- while (!(psc->psc_status & PSC_SR_TXRDY));
-
- psc->psc_buffer_8 = chr;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
while ((com_port->lsr & UART_LSR_THRE) == 0);
com_port->thr = chr;
-#else
- while (!(ps2ser_in(UART_LSR) & UART_LSR_THRE));
-
- ps2ser_out(UART_TX, chr);
-#endif
}
static int ps2ser_getc_hw(void)
{
-#ifdef CONFIG_MPC5xxx
- volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
NS16550_t com_port = (NS16550_t)COM_BASE;
-#endif
int res = -1;
-#ifdef CONFIG_MPC5xxx
- if (psc->psc_status & PSC_SR_RXRDY) {
- res = (psc->psc_buffer_8);
- }
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
if (com_port->lsr & UART_LSR_DR) {
res = com_port->rbr;
}
-#else
- if (ps2ser_in(UART_LSR) & UART_LSR_DR) {
- res = (ps2ser_in(UART_RX));
- }
-#endif
return res;
}
volatile int chr;
int flags;
-#ifdef DEBUG
- printf("<< ");
-#endif
+ debug("<< ");
flags = disable_interrupts();
}
while (chr < 0);
- if (flags) enable_interrupts();
+ if (flags)
+ enable_interrupts();
-#ifdef DEBUG
- printf("0x%02x\n", chr);
-#endif
+ debug("0x%02x\n", chr);
return chr;
}
static void ps2ser_interrupt(void *dev_id)
{
-#ifdef CONFIG_MPC5xxx
- volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
NS16550_t com_port = (NS16550_t)COM_BASE;
-#endif
int chr;
int status;
do {
chr = ps2ser_getc_hw();
-#ifdef CONFIG_MPC5xxx
- status = psc->psc_status;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
status = com_port->lsr;
-#else
- status = ps2ser_in(UART_IIR);
-#endif
if (chr < 0) continue;
if (atomic_read(&ps2buf_cnt) < PS2BUF_SIZE) {
} else {
printf ("ps2ser.c: buffer overflow\n");
}
-#ifdef CONFIG_MPC5xxx
- } while (status & PSC_SR_RXRDY);
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
- defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
} while (status & UART_LSR_DR);
-#else
- } while (status & UART_IIR_RDI);
-#endif
-
if (atomic_read(&ps2buf_cnt)) {
ps2mult_callback(atomic_read(&ps2buf_cnt));
}
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