From 7e6bf358d84b413b7a402079b130a9a2a1222d74 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sun, 12 Dec 2004 22:06:17 +0000
Subject: Patch by Martin Krause, 27 Oct 2004: - add support for "STK52xx"
 board (including PS/2 multiplexer) - add hardware detection for TQM5200

---
 drivers/keyboard.c |  15 +++++++-
 drivers/ps2ser.c   | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 118 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/keyboard.c b/drivers/keyboard.c
index a42468f..f12de83 100644
--- a/drivers/keyboard.c
+++ b/drivers/keyboard.c
@@ -33,6 +33,10 @@
 
 #define	KBD_BUFFER_LEN		0x20  /* size of the keyboardbuffer */
 
+#ifdef CONFIG_MPC5xxx
+int ps2ser_check(void);
+#endif
+
 static volatile char kbd_buffer[KBD_BUFFER_LEN];
 static volatile int in_pointer = 0;
 static volatile int out_pointer = 0;
@@ -71,6 +75,10 @@ static void kbd_put_queue(char data)
 /* test if a character is in the queue */
 static int kbd_testc(void)
 {
+#ifdef CONFIG_MPC5xxx
+	/* no ISR is used, so received chars must be polled */
+	ps2ser_check();
+#endif
 	if(in_pointer==out_pointer)
 		return(0); /* no data */
 	else
@@ -81,7 +89,12 @@ static int kbd_testc(void)
 static int kbd_getc(void)
 {
 	char c;
-	while(in_pointer==out_pointer);
+	while(in_pointer==out_pointer) {
+#ifdef CONFIG_MPC5xxx
+	/* no ISR is used, so received chars must be polled */
+	ps2ser_check();
+#endif
+	;}
 	if((out_pointer+1)==KBD_BUFFER_LEN)
 		out_pointer=0;
 	else
diff --git a/drivers/ps2ser.c b/drivers/ps2ser.c
index 52f1db9..56925a8 100644
--- a/drivers/ps2ser.c
+++ b/drivers/ps2ser.c
@@ -25,17 +25,88 @@
 
 #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
+#endif /* CONFIG_MPC5xxx */
+
 static int	ps2ser_getc_hw(void);
 static void	ps2ser_interrupt(void *dev_id);
 
 extern struct	serial_state rs_table[]; /* in serial.c */
+#ifndef CONFIG_MPC5xxx
 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)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	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 = (CFG_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);
+}
+
+#else /* !CONFIG_MPC5xxx */
 
 static inline unsigned int ps2ser_in(int offset)
 {
@@ -79,25 +150,44 @@ int ps2ser_init(void)
 
 	return 0;
 }
+#endif /* CONFIG_MPC5xxx */
 
 void ps2ser_putc(int chr)
 {
+#ifdef CONFIG_MPC5xxx
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+#endif
 #ifdef DEBUG
 	printf(">>>> 0x%02x\n", chr);
 #endif
 
+#ifdef CONFIG_MPC5xxx
+	while (!(psc->psc_status & PSC_SR_TXRDY));
+	
+	psc->psc_buffer_8 = 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;
+#endif
 	int res = -1;
 
+#ifdef CONFIG_MPC5xxx
+	if (psc->psc_status & PSC_SR_RXRDY) {
+		res = (psc->psc_buffer_8);
+	}
+#else
 	if (ps2ser_in(UART_LSR) & UART_LSR_DR) {
 		res = (ps2ser_in(UART_RX));
 	}
+#endif
 
 	return res;
 }
@@ -146,12 +236,19 @@ int ps2ser_check(void)
 
 static void ps2ser_interrupt(void *dev_id)
 {
+#ifdef CONFIG_MPC5xxx
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+#endif
 	int chr;
-	int iir;
+	int status;
 
 	do {
 		chr = ps2ser_getc_hw();
-		iir = ps2ser_in(UART_IIR);
+#ifdef CONFIG_MPC5xxx
+		status = psc->psc_status;
+#else
+		status = ps2ser_in(UART_IIR);
+#endif
 		if (chr < 0) continue;
 
 		if (atomic_read(&ps2buf_cnt) < PS2BUF_SIZE) {
@@ -161,7 +258,11 @@ static void ps2ser_interrupt(void *dev_id)
 		} else {
 			printf ("ps2ser.c: buffer overflow\n");
 		}
-	} while (iir & UART_IIR_RDI);
+#ifdef CONFIG_MPC5xxx
+	} while (status & PSC_SR_RXRDY);		
+#else
+	} while (status & UART_IIR_RDI);
+#endif
 
 	if (atomic_read(&ps2buf_cnt)) {
 		ps2mult_callback(atomic_read(&ps2buf_cnt));
-- 
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