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Diffstat (limited to 'arch/powerpc/cpu/mpc8xx/spi.c')
-rw-r--r--arch/powerpc/cpu/mpc8xx/spi.c533
1 files changed, 0 insertions, 533 deletions
diff --git a/arch/powerpc/cpu/mpc8xx/spi.c b/arch/powerpc/cpu/mpc8xx/spi.c
deleted file mode 100644
index 35b425e7c14..00000000000
--- a/arch/powerpc/cpu/mpc8xx/spi.c
+++ /dev/null
@@ -1,533 +0,0 @@
-/*
- * 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 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * MPC8xx 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 <mpc8xx.h>
-#include <commproc.h>
-#include <linux/ctype.h>
-#include <malloc.h>
-#include <post.h>
-#include <serial.h>
-
-#if (defined(CONFIG_SPI)) || (CONFIG_POST & CONFIG_SYS_POST_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 0xb00 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 0xB00
-#endif
-
-#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 *)&((cpm8xx_t *)&((immap_t *)CONFIG_SYS_IMMR)->im_cpm)->cp_dpmem
- [CONFIG_SYS_SPI_INIT_OFFSET];
-static uchar *txbuf =
- (uchar *)&((cpm8xx_t *)&((immap_t *)CONFIG_SYS_IMMR)->im_cpm)->cp_dpmem
- [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 cpm8xx_t *cp;
- volatile cbd_t *tbdf, *rbdf;
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8xx_t *) &immr->im_cpm;
-
-#ifdef CONFIG_SYS_SPI_UCODE_PATCH
- spi = (spi_t *)&cp->cp_dpmem[spi->spi_rpbase];
-#else
- spi = (spi_t *)&cp->cp_dparam[PROFF_SPI];
- /* Disable relocation */
- spi->spi_rpbase = 0;
-#endif
-
-/* 1 */
- /* ------------------------------------------------
- * Initialize Port B SPI pins -> page 34-8 MPC860UM
- * (we are only in Master Mode !)
- * ------------------------------------------------ */
-
- /* --------------------------------------------
- * GPIO or per. Function
- * PBPAR[28] = 1 [0x00000008] -> PERI: (SPIMISO)
- * PBPAR[29] = 1 [0x00000004] -> PERI: (SPIMOSI)
- * PBPAR[30] = 1 [0x00000002] -> PERI: (SPICLK)
- * PBPAR[31] = 0 [0x00000001] -> GPIO: (CS for PCUE/CCM-EEPROM)
- * -------------------------------------------- */
- cp->cp_pbpar |= 0x0000000E; /* set bits */
- cp->cp_pbpar &= ~0x00000001; /* reset bit */
-
- /* ----------------------------------------------
- * In/Out or per. Function 0/1
- * PBDIR[28] = 1 [0x00000008] -> PERI1: SPIMISO
- * PBDIR[29] = 1 [0x00000004] -> PERI1: SPIMOSI
- * PBDIR[30] = 1 [0x00000002] -> PERI1: SPICLK
- * PBDIR[31] = 1 [0x00000001] -> GPIO OUT: CS for PCUE/CCM-EEPROM
- * ---------------------------------------------- */
- cp->cp_pbdir |= 0x0000000F;
-
- /* ----------------------------------------------
- * open drain or active output
- * PBODR[28] = 1 [0x00000008] -> open drain: SPIMISO
- * PBODR[29] = 0 [0x00000004] -> active output SPIMOSI
- * PBODR[30] = 0 [0x00000002] -> active output: SPICLK
- * PBODR[31] = 0 [0x00000001] -> active output: GPIO OUT: CS for PCUE/CCM
- * ---------------------------------------------- */
-
- cp->cp_pbodr |= 0x00000008;
- cp->cp_pbodr &= ~0x00000007;
-
- /* 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;
-
- dpaddr = CPM_SPI_BASE;
-
-/* 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 */
-#ifdef CONFIG_SYS_SPI_UCODE_PATCH
- /*
- * Initialize required parameters if using microcode patch.
- */
- spi->spi_rstate = 0;
- spi->spi_tstate = 0;
-#else
- /* Init SPI Tx + Rx Parameters */
- while (cp->cp_cpcr & CPM_CR_FLG)
- ;
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SPI, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG)
- ;
-#endif /* CONFIG_SYS_SPI_UCODE_PATCH */
-
-/* 5 */
- /* Set SDMA configuration register */
- immr->im_siu_conf.sc_sdcr = 0x0001;
-
-/* 6 */
- /* Set to big endian. */
- spi->spi_tfcr = SMC_EB;
- spi->spi_rfcr = SMC_EB;
-
-/* 7 */
- /* Set maximum receive size. */
- spi->spi_mrblr = MAX_BUFFER;
-
-/* 8 + 9 */
- /* tx and rx buffer descriptors */
- tbdf = (cbd_t *) & cp->cp_dpmem[spi->spi_tbase];
- rbdf = (cbd_t *) & cp->cp_dpmem[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 */
- cp->cp_spim = 0; /* Mask all SPI events */
- cp->cp_spie = SPI_EMASK; /* Clear 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 cpm8xx_t *cp;
- volatile spi_t *spi;
- volatile immap_t *immr;
- volatile cbd_t *tbdf, *rbdf;
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8xx_t *) &immr->im_cpm;
-
-#ifdef CONFIG_SYS_SPI_UCODE_PATCH
- spi = (spi_t *)&cp->cp_dpmem[spi->spi_rpbase];
-#else
- spi = (spi_t *)&cp->cp_dparam[PROFF_SPI];
- /* Disable relocation */
- spi->spi_rpbase = 0;
-#endif
-
- /* tx and rx buffer descriptors */
- tbdf = (cbd_t *) & cp->cp_dpmem[spi->spi_tbase];
- rbdf = (cbd_t *) & cp->cp_dpmem[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 cpm8xx_t *cp;
- volatile spi_t *spi;
- cbd_t *tbdf, *rbdf;
- ushort loop;
- int tm;
-
- DPRINT (("*** spi_xfer entered ***\n"));
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8xx_t *) &immr->im_cpm;
-
-#ifdef CONFIG_SYS_SPI_UCODE_PATCH
- spi = (spi_t *)&cp->cp_dpmem[spi->spi_rpbase];
-#else
- spi = (spi_t *)&cp->cp_dparam[PROFF_SPI];
- /* Disable relocation */
- spi->spi_rpbase = 0;
-#endif
-
- tbdf = (cbd_t *) & cp->cp_dpmem[spi->spi_tbase];
- rbdf = (cbd_t *) & cp->cp_dpmem[spi->spi_rbase];
-
- /* Set CS for device */
- cp->cp_pbdat &= ~0x0001;
-
- /* 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 */
-
- loop = cp->cp_spmode & SPMODE_LOOP;
- cp->cp_spmode = /*SPMODE_DIV16 |*/ /* BRG/16 mode not used here */
- loop |
- SPMODE_REV |
- SPMODE_MSTR |
- SPMODE_EN |
- SPMODE_LEN(8) | /* 8 Bits per char */
- SPMODE_PM(0x8) ; /* medium speed */
- cp->cp_spim = 0; /* Mask all SPI events */
- cp->cp_spie = SPI_EMASK; /* Clear all SPI events */
-
- /* start spi transfer */
- DPRINT (("*** spi_xfer: Performing transfer ...\n"));
- cp->cp_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 (cp->cp_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 */
- cp->cp_pbdat |= 0x0001;
-
- return count;
-}
-#endif /* CONFIG_SPI || (CONFIG_POST & CONFIG_SYS_POST_SPI) */
-
-/*
- * SPI test
- *
- * The Serial Peripheral Interface (SPI) is tested in the local loopback mode.
- * The interface is configured accordingly and several packets
- * are transferred. The configurable test parameters are:
- * TEST_MIN_LENGTH - minimum size of packet to transfer
- * TEST_MAX_LENGTH - maximum size of packet to transfer
- * TEST_NUM - number of tests
- */
-
-#if CONFIG_POST & CONFIG_SYS_POST_SPI
-
-#define TEST_MIN_LENGTH 1
-#define TEST_MAX_LENGTH MAX_BUFFER
-#define TEST_NUM 1
-
-static void packet_fill (char * packet, int length)
-{
- char c = (char) length;
- int i;
-
- for (i = 0; i < length; i++)
- {
- packet[i] = c++;
- }
-}
-
-static int packet_check (char * packet, int length)
-{
- char c = (char) length;
- int i;
-
- for (i = 0; i < length; i++) {
- if (packet[i] != c++) return -1;
- }
-
- return 0;
-}
-
-int spi_post_test (int flags)
-{
- int res = -1;
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
- volatile cpm8xx_t *cp = (cpm8xx_t *) & immr->im_cpm;
- int i;
- int l;
-
- spi_init_f ();
- spi_init_r ();
-
- cp->cp_spmode |= SPMODE_LOOP;
-
- for (i = 0; i < TEST_NUM; i++) {
- for (l = TEST_MIN_LENGTH; l <= TEST_MAX_LENGTH; l += 8) {
- packet_fill ((char *)txbuf, l);
-
- spi_xfer (l);
-
- if (packet_check ((char *)rxbuf, l) < 0) {
- goto Done;
- }
- }
- }
-
- res = 0;
-
- Done:
-
- cp->cp_spmode &= ~SPMODE_LOOP;
-
- /*
- * SCC2 parameter RAM space overlaps
- * the SPI parameter RAM space. So we need to restore
- * the SCC2 configuration if it is used by UART.
- */
-
-#if !defined(CONFIG_8xx_CONS_NONE)
- serial_reinit_all ();
-#endif
-
- if (res != 0) {
- post_log ("SPI test failed\n");
- }
-
- return res;
-}
-#endif /* CONFIG_POST & CONFIG_SYS_POST_SPI */
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