diff options
Diffstat (limited to 'board/mbx8xx/vpd.c')
| -rw-r--r-- | board/mbx8xx/vpd.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/board/mbx8xx/vpd.c b/board/mbx8xx/vpd.c deleted file mode 100644 index 1ba754e..0000000 --- a/board/mbx8xx/vpd.c +++ /dev/null @@ -1,180 +0,0 @@ -/* - * (C) Copyright 2000 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * Code in faintly related to linux/arch/powerpc/8xx_io: - * MPC8xx CPM I2C interface. Copyright (c) 1999 Dan Malek (dmalek@jlc.net). - * - * This file implements functions to read the MBX's Vital Product Data - * (VPD). I can't use the more general i2c code in mpc8xx/... since I need - * the VPD at a time where there is no RAM available yet. Hence the VPD is - * read into a special area in the DPRAM (see config_MBX.h::CFG_DPRAMVPD). - * - * ----------------------------------------------------------------- - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#ifdef CONFIG_8xx -#include <commproc.h> -#endif -#include "vpd.h" - -/* Location of receive/transmit buffer descriptors - * Allocate one transmit bd and one receive bd. - * IIC_BD_FREE points to free bd space which we'll use as tx buffer. - */ -#define IIC_BD_TX1 (BD_IIC_START + 0*sizeof(cbd_t)) -#define IIC_BD_TX2 (BD_IIC_START + 1*sizeof(cbd_t)) -#define IIC_BD_RX (BD_IIC_START + 2*sizeof(cbd_t)) -#define IIC_BD_FREE (BD_IIC_START + 3*sizeof(cbd_t)) - -/* FIXME -- replace 0x2000 with offsetof */ -#define VPD_P ((vpd_t *)(CONFIG_SYS_IMMR + 0x2000 + CONFIG_SYS_DPRAMVPD)) - -/* transmit/receive buffers */ -#define IIC_RX_LENGTH 128 - -#define WITH_MICROCODE_PATCH - -vpd_packet_t * vpd_find_packet(u_char ident) -{ - vpd_packet_t *packet; - vpd_t *vpd = VPD_P; - - packet = (vpd_packet_t *)&vpd->packets; - while ((packet->identifier != ident) && packet->identifier != 0xFF) - { - packet = (vpd_packet_t *)((char *)packet + packet->size + 2); - } - return packet; -} - -void vpd_init(void) -{ - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile cpm8xx_t *cp = &(im->im_cpm); - volatile i2c8xx_t *i2c = (i2c8xx_t *)&(im->im_i2c); - volatile iic_t *iip; -#ifdef WITH_MICROCODE_PATCH - ulong reloc = 0; -#endif - - iip = (iic_t *)&cp->cp_dparam[PROFF_IIC]; - - /* - * kludge: when running from flash, no microcode patch can be - * installed. However, the DPMEM usually contains non-zero - * garbage at the relocatable patch base location, so lets clear - * it now. This way the rest of the code can support the microcode - * patch dynamically. - */ - if ((ulong)vpd_init & 0xff000000) - iip->iic_rpbase = 0; - -#ifdef WITH_MICROCODE_PATCH - /* Check for and use a microcode relocation patch. */ - if ((reloc = iip->iic_rpbase)) - iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase]; -#endif - /* Initialize Port B IIC pins */ - cp->cp_pbpar |= 0x00000030; - cp->cp_pbdir |= 0x00000030; - cp->cp_pbodr |= 0x00000030; - - i2c->i2c_i2mod = 0x04; /* filter clock */ - i2c->i2c_i2add = 0x34; /* select an arbitrary (unique) address */ - i2c->i2c_i2brg = 0x07; /* make clock run maximum slow */ - i2c->i2c_i2cmr = 0x00; /* disable interrupts */ - i2c->i2c_i2cer = 0x1f; /* clear events */ - i2c->i2c_i2com = 0x01; /* configure i2c to work as master */ - - if (vpd_read(0xa4, (uchar*)VPD_P, VPD_EEPROM_SIZE, 0) != VPD_EEPROM_SIZE) - { - hang(); - } -} - - -/* Read from I2C. - * This is a two step process. First, we send the "dummy" write - * to set the device offset for the read. Second, we perform - * the read operation. - */ -int vpd_read(uint iic_device, uchar *buf, int count, int offset) -{ - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile cpm8xx_t *cp = &(im->im_cpm); - volatile i2c8xx_t *i2c = (i2c8xx_t *)&(im->im_i2c); - volatile iic_t *iip; - volatile cbd_t *tbdf1, *tbdf2, *rbdf; - uchar *tb; - uchar event; -#ifdef WITH_MICROCODE_PATCH - ulong reloc = 0; -#endif - - iip = (iic_t *)&cp->cp_dparam[PROFF_IIC]; -#ifdef WITH_MICROCODE_PATCH - /* Check for and use a microcode relocation patch. */ - if ((reloc = iip->iic_rpbase)) - iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase]; -#endif - tbdf1 = (cbd_t *)&cp->cp_dpmem[IIC_BD_TX1]; - tbdf2 = (cbd_t *)&cp->cp_dpmem[IIC_BD_TX2]; - rbdf = (cbd_t *)&cp->cp_dpmem[IIC_BD_RX]; - - /* Send a "dummy write" operation. This is a write request with - * only the offset sent, followed by another start condition. - * This will ensure we start reading from the first location - * of the EEPROM. - */ - tb = (uchar*)&cp->cp_dpmem[IIC_BD_FREE]; - tb[0] = iic_device & 0xfe; /* device address */ - tb[1] = offset; /* offset */ - tbdf1->cbd_bufaddr = (uint)tb; - tbdf1->cbd_datlen = 2; - tbdf1->cbd_sc = 0x8400; - - tb += 2; - tb[0] = iic_device | 1; /* device address */ - tbdf2->cbd_bufaddr = (uint)tb; - tbdf2->cbd_datlen = count+1; - tbdf2->cbd_sc = 0xbc00; - - rbdf->cbd_bufaddr = (uint)buf; - rbdf->cbd_datlen = 0; - rbdf->cbd_sc = 0xb000; - - iip->iic_tbase = IIC_BD_TX1; - iip->iic_tbptr = IIC_BD_TX1; - iip->iic_rbase = IIC_BD_RX; - iip->iic_rbptr = IIC_BD_RX; - iip->iic_rfcr = 0x15; - iip->iic_tfcr = 0x15; - iip->iic_mrblr = count; - iip->iic_rstate = 0; - iip->iic_tstate = 0; - - i2c->i2c_i2cer = 0x1f; /* clear event mask */ - i2c->i2c_i2mod |= 1; /* enable iic operation */ - i2c->i2c_i2com |= 0x80; /* start master */ - - /* wait for IIC transfer */ - do { - __asm__ volatile ("eieio"); - event = i2c->i2c_i2cer; - } while (event == 0); - - if ((event & 0x10) || (event & 0x04)) { - count = -1; - goto bailout; - } - -bailout: - i2c->i2c_i2mod &= ~1; /* turn off iic operation */ - i2c->i2c_i2cer = 0x1f; /* clear event mask */ - - return count; -} |