Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

1 files changed, 435 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc8260/spi.c b/arch/powerpc/cpu/mpc8260/spi.c
new file mode 100644
index 0000000..f5d2ac3
--- /dev/null
+++ b/arch/powerpc/cpu/mpc8260/spi.c
@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) 2001 Navin Boppuri / Prashant Patel
+ *	<nboppuri@trinetcommunication.com>,
+ *	<pmpatel@trinetcommunication.com>
+ * Copyright (c) 2001 Gerd Mennchen <Gerd.Mennchen@icn.siemens.de>
+ * Copyright (c) 2001-2003 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * MPC8260 CPM SPI interface.
+ *
+ * Parts of this code are probably not portable and/or specific to
+ * the board which I used for the tests. Please send fixes/complaints
+ * to wd@denx.de
+ *
+ */
+
+#include <common.h>
+#include <asm/cpm_8260.h>
+#include <linux/ctype.h>
+#include <malloc.h>
+#include <post.h>
+#include <net.h>
+
+#if defined(CONFIG_SPI)
+
+/* Warning:
+ * You cannot enable DEBUG for early system initalization, i. e. when
+ * this driver is used to read environment parameters like "baudrate"
+ * from EEPROM which are used to initialize the serial port which is
+ * needed to print the debug messages...
+ */
+#undef	DEBUG
+
+#define SPI_EEPROM_WREN		0x06
+#define SPI_EEPROM_RDSR		0x05
+#define SPI_EEPROM_READ		0x03
+#define SPI_EEPROM_WRITE	0x02
+
+/* ---------------------------------------------------------------
+ * Offset for initial SPI buffers in DPRAM:
+ * We need a 520 byte scratch DPRAM area to use at an early stage.
+ * It is used between the two initialization calls (spi_init_f()
+ * and spi_init_r()).
+ * The value 0x2000 makes it far enough from the start of the data
+ * area (as well as from the stack pointer).
+ * --------------------------------------------------------------- */
+#ifndef	CONFIG_SYS_SPI_INIT_OFFSET
+#define	CONFIG_SYS_SPI_INIT_OFFSET	0x2000
+#endif
+
+#define CPM_SPI_BASE 0x100
+
+#ifdef	DEBUG
+
+#define	DPRINT(a)	printf a;
+/* -----------------------------------------------
+ * Helper functions to peek into tx and rx buffers
+ * ----------------------------------------------- */
+static const char * const hex_digit = "0123456789ABCDEF";
+
+static char quickhex (int i)
+{
+	return hex_digit[i];
+}
+
+static void memdump (void *pv, int num)
+{
+	int i;
+	unsigned char *pc = (unsigned char *) pv;
+
+	for (i = 0; i < num; i++)
+		printf ("%c%c ", quickhex (pc[i] >> 4), quickhex (pc[i] & 0x0f));
+	printf ("\t");
+	for (i = 0; i < num; i++)
+		printf ("%c", isprint (pc[i]) ? pc[i] : '.');
+	printf ("\n");
+}
+#else	/* !DEBUG */
+
+#define	DPRINT(a)
+
+#endif	/* DEBUG */
+
+/* -------------------
+ * Function prototypes
+ * ------------------- */
+void spi_init (void);
+
+ssize_t spi_read (uchar *, int, uchar *, int);
+ssize_t spi_write (uchar *, int, uchar *, int);
+ssize_t spi_xfer (size_t);
+
+/* -------------------
+ * Variables
+ * ------------------- */
+
+#define MAX_BUFFER	0x104
+
+/* ----------------------------------------------------------------------
+ * Initially we place the RX and TX buffers at a fixed location in DPRAM!
+ * ---------------------------------------------------------------------- */
+static uchar *rxbuf =
+  (uchar *)&((immap_t *)CONFIG_SYS_IMMR)->im_dprambase
+			[CONFIG_SYS_SPI_INIT_OFFSET];
+static uchar *txbuf =
+  (uchar *)&((immap_t *)CONFIG_SYS_IMMR)->im_dprambase
+			[CONFIG_SYS_SPI_INIT_OFFSET+MAX_BUFFER];
+
+/* **************************************************************************
+ *
+ *  Function:    spi_init_f
+ *
+ *  Description: Init SPI-Controller (ROM part)
+ *
+ *  return:      ---
+ *
+ * *********************************************************************** */
+void spi_init_f (void)
+{
+	unsigned int dpaddr;
+
+	volatile spi_t *spi;
+	volatile immap_t *immr;
+	volatile cpm8260_t *cp;
+	volatile cbd_t *tbdf, *rbdf;
+
+	immr = (immap_t *)  CONFIG_SYS_IMMR;
+	cp   = (cpm8260_t *) &immr->im_cpm;
+
+	*(ushort *)(&immr->im_dprambase[PROFF_SPI_BASE]) = PROFF_SPI;
+	spi  = (spi_t *)&immr->im_dprambase[PROFF_SPI];
+
+/* 1 */
+	/* ------------------------------------------------
+	 * Initialize Port D SPI pins
+	 * (we are only in Master Mode !)
+	 * ------------------------------------------------ */
+
+	/* --------------------------------------------
+	 * GPIO or per. Function
+	 * PPARD[16] = 1 [0x00008000] (SPIMISO)
+	 * PPARD[17] = 1 [0x00004000] (SPIMOSI)
+	 * PPARD[18] = 1 [0x00002000] (SPICLK)
+	 * PPARD[12] = 0 [0x00080000] -> GPIO: (CS for ATC EEPROM)
+	 * -------------------------------------------- */
+	immr->im_ioport.iop_ppard |=  0x0000E000;	/* set  bits	*/
+	immr->im_ioport.iop_ppard &= ~0x00080000;	/* reset bit	*/
+
+	/* ----------------------------------------------
+	 * In/Out or per. Function 0/1
+	 * PDIRD[16] = 0 [0x00008000] -> PERI1: SPIMISO
+	 * PDIRD[17] = 0 [0x00004000] -> PERI1: SPIMOSI
+	 * PDIRD[18] = 0 [0x00002000] -> PERI1: SPICLK
+	 * PDIRD[12] = 1 [0x00080000] -> GPIO OUT: CS for ATC EEPROM
+	 * ---------------------------------------------- */
+	immr->im_ioport.iop_pdird &= ~0x0000E000;
+	immr->im_ioport.iop_pdird |= 0x00080000;
+
+	/* ----------------------------------------------
+	 * special option reg.
+	 * PSORD[16] = 1 [0x00008000] -> SPIMISO
+	 * PSORD[17] = 1 [0x00004000] -> SPIMOSI
+	 * PSORD[18] = 1 [0x00002000] -> SPICLK
+	 * ---------------------------------------------- */
+	immr->im_ioport.iop_psord |= 0x0000E000;
+
+	/* Initialize the parameter ram.
+	 * We need to make sure many things are initialized to zero
+	 */
+	spi->spi_rstate	= 0;
+	spi->spi_rdp	= 0;
+	spi->spi_rbptr	= 0;
+	spi->spi_rbc	= 0;
+	spi->spi_rxtmp	= 0;
+	spi->spi_tstate	= 0;
+	spi->spi_tdp	= 0;
+	spi->spi_tbptr	= 0;
+	spi->spi_tbc	= 0;
+	spi->spi_txtmp	= 0;
+
+	/* Allocate space for one transmit and one receive buffer
+	 * descriptor in the DP ram
+	 */
+#ifdef CONFIG_SYS_ALLOC_DPRAM
+	dpaddr = m8260_cpm_dpalloc (sizeof(cbd_t)*2, 8);
+#else
+	dpaddr = CPM_SPI_BASE;
+#endif
+
+/* 3 */
+	/* Set up the SPI parameters in the parameter ram */
+	spi->spi_rbase = dpaddr;
+	spi->spi_tbase = dpaddr + sizeof (cbd_t);
+
+	/***********IMPORTANT******************/
+
+	/*
+	 * Setting transmit and receive buffer descriptor pointers
+	 * initially to rbase and tbase. Only the microcode patches
+	 * documentation talks about initializing this pointer. This
+	 * is missing from the sample I2C driver. If you dont
+	 * initialize these pointers, the kernel hangs.
+	 */
+	spi->spi_rbptr = spi->spi_rbase;
+	spi->spi_tbptr = spi->spi_tbase;
+
+/* 4 */
+	/* Init SPI Tx + Rx Parameters */
+	while (cp->cp_cpcr & CPM_CR_FLG)
+		;
+	cp->cp_cpcr = mk_cr_cmd(CPM_CR_SPI_PAGE, CPM_CR_SPI_SBLOCK,
+							0, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+	while (cp->cp_cpcr & CPM_CR_FLG)
+		;
+
+/* 6 */
+	/* Set to big endian. */
+	spi->spi_tfcr = CPMFCR_EB;
+	spi->spi_rfcr = CPMFCR_EB;
+
+/* 7 */
+	/* Set maximum receive size. */
+	spi->spi_mrblr = MAX_BUFFER;
+
+/* 8 + 9 */
+	/* tx and rx buffer descriptors */
+	tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
+	rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
+
+	tbdf->cbd_sc &= ~BD_SC_READY;
+	rbdf->cbd_sc &= ~BD_SC_EMPTY;
+
+	/* Set the bd's rx and tx buffer address pointers */
+	rbdf->cbd_bufaddr = (ulong) rxbuf;
+	tbdf->cbd_bufaddr = (ulong) txbuf;
+
+/* 10 + 11 */
+	immr->im_spi.spi_spie = SPI_EMASK;		/* Clear all SPI events	*/
+	immr->im_spi.spi_spim = 0x00;			/* Mask  all SPI events */
+
+
+	return;
+}
+
+/* **************************************************************************
+ *
+ *  Function:    spi_init_r
+ *
+ *  Description: Init SPI-Controller (RAM part) -
+ *		 The malloc engine is ready and we can move our buffers to
+ *		 normal RAM
+ *
+ *  return:      ---
+ *
+ * *********************************************************************** */
+void spi_init_r (void)
+{
+	volatile spi_t *spi;
+	volatile immap_t *immr;
+	volatile cpm8260_t *cp;
+	volatile cbd_t *tbdf, *rbdf;
+
+	immr = (immap_t *)  CONFIG_SYS_IMMR;
+	cp   = (cpm8260_t *) &immr->im_cpm;
+
+	spi  = (spi_t *)&immr->im_dprambase[PROFF_SPI];
+
+	/* tx and rx buffer descriptors */
+	tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
+	rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
+
+	/* Allocate memory for RX and TX buffers */
+	rxbuf = (uchar *) malloc (MAX_BUFFER);
+	txbuf = (uchar *) malloc (MAX_BUFFER);
+
+	rbdf->cbd_bufaddr = (ulong) rxbuf;
+	tbdf->cbd_bufaddr = (ulong) txbuf;
+
+	return;
+}
+
+/****************************************************************************
+ *  Function:    spi_write
+ **************************************************************************** */
+ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
+{
+	int i;
+
+	memset(rxbuf, 0, MAX_BUFFER);
+	memset(txbuf, 0, MAX_BUFFER);
+	*txbuf = SPI_EEPROM_WREN;		/* write enable		*/
+	spi_xfer(1);
+	memcpy(txbuf, addr, alen);
+	*txbuf = SPI_EEPROM_WRITE;		/* WRITE memory array	*/
+	memcpy(alen + txbuf, buffer, len);
+	spi_xfer(alen + len);
+						/* ignore received data	*/
+	for (i = 0; i < 1000; i++) {
+		*txbuf = SPI_EEPROM_RDSR;	/* read status		*/
+		txbuf[1] = 0;
+		spi_xfer(2);
+		if (!(rxbuf[1] & 1)) {
+			break;
+		}
+		udelay(1000);
+	}
+	if (i >= 1000) {
+		printf ("*** spi_write: Time out while writing!\n");
+	}
+
+	return len;
+}
+
+/****************************************************************************
+ *  Function:    spi_read
+ **************************************************************************** */
+ssize_t spi_read (uchar *addr, int alen, uchar *buffer, int len)
+{
+	memset(rxbuf, 0, MAX_BUFFER);
+	memset(txbuf, 0, MAX_BUFFER);
+	memcpy(txbuf, addr, alen);
+	*txbuf = SPI_EEPROM_READ;		/* READ memory array	*/
+
+	/*
+	 * There is a bug in 860T (?) that cuts the last byte of input
+	 * if we're reading into DPRAM. The solution we choose here is
+	 * to always read len+1 bytes (we have one extra byte at the
+	 * end of the buffer).
+	 */
+	spi_xfer(alen + len + 1);
+	memcpy(buffer, alen + rxbuf, len);
+
+	return len;
+}
+
+/****************************************************************************
+ *  Function:    spi_xfer
+ **************************************************************************** */
+ssize_t spi_xfer (size_t count)
+{
+	volatile immap_t *immr;
+	volatile cpm8260_t *cp;
+	volatile spi_t *spi;
+	cbd_t *tbdf, *rbdf;
+	int tm;
+
+	DPRINT (("*** spi_xfer entered ***\n"));
+
+	immr = (immap_t *) CONFIG_SYS_IMMR;
+	cp   = (cpm8260_t *) &immr->im_cpm;
+
+	spi  = (spi_t *)&immr->im_dprambase[PROFF_SPI];
+
+	tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
+	rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
+
+	/* Board-specific: Set CS for device (ATC EEPROM) */
+	immr->im_ioport.iop_pdatd &= ~0x00080000;
+
+	/* Setting tx bd status and data length */
+	tbdf->cbd_sc  = BD_SC_READY | BD_SC_LAST | BD_SC_WRAP;
+	tbdf->cbd_datlen = count;
+
+	DPRINT (("*** spi_xfer: Bytes to be xferred: %d ***\n",
+							tbdf->cbd_datlen));
+
+	/* Setting rx bd status and data length */
+	rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP;
+	rbdf->cbd_datlen = 0;	 /* rx length has no significance */
+
+	immr->im_spi.spi_spmode = SPMODE_REV	|
+			SPMODE_MSTR	|
+			SPMODE_EN	|
+			SPMODE_LEN(8)	|	/* 8 Bits per char */
+			SPMODE_PM(0x8) ;	/* medium speed */
+	immr->im_spi.spi_spie = SPI_EMASK;		/* Clear all SPI events	*/
+	immr->im_spi.spi_spim = 0x00;			/* Mask  all SPI events */
+
+	/* start spi transfer */
+	DPRINT (("*** spi_xfer: Performing transfer ...\n"));
+	immr->im_spi.spi_spcom |= SPI_STR;		/* Start transmit */
+
+	/* --------------------------------
+	 * Wait for SPI transmit to get out
+	 * or time out (1 second = 1000 ms)
+	 * -------------------------------- */
+	for (tm=0; tm<1000; ++tm) {
+		if (immr->im_spi.spi_spie & SPI_TXB) {	/* Tx Buffer Empty */
+			DPRINT (("*** spi_xfer: Tx buffer empty\n"));
+			break;
+		}
+		if ((tbdf->cbd_sc & BD_SC_READY) == 0) {
+			DPRINT (("*** spi_xfer: Tx BD done\n"));
+			break;
+		}
+		udelay (1000);
+	}
+	if (tm >= 1000) {
+		printf ("*** spi_xfer: Time out while xferring to/from SPI!\n");
+	}
+	DPRINT (("*** spi_xfer: ... transfer ended\n"));
+
+#ifdef	DEBUG
+	printf ("\nspi_xfer: txbuf after xfer\n");
+	memdump ((void *) txbuf, 16);	/* dump of txbuf before transmit */
+	printf ("spi_xfer: rxbuf after xfer\n");
+	memdump ((void *) rxbuf, 16);	/* dump of rxbuf after transmit */
+	printf ("\n");
+#endif
+
+	/* Clear CS for device */
+	immr->im_ioport.iop_pdatd |= 0x00080000;
+
+	return count;
+}
+#endif	/* CONFIG_SPI */