![Timur Tabi](/assets/img/avatar_default.png)
This patch makes numerous miscellaneous code improvements to the QE library. 1. Remove struct ucc_common and merge ucc_init_guemr() into ucc_set_type() (every caller of ucc_init_guemr() also calls ucc_set_type()). Modify all callers of ucc_set_type() accordingly. 2. Remove the unused enum ucc_pram_initial_offset. 3. Refactor qe_setbrg(), also implement work-around for errata QE_General4. 4. Several printk() calls were missing the terminating \n. 5. Add __iomem where needed, and change u16 to __be16 and u32 to __be32 where appropriate. 6. In ucc_slow_init() the RBASE and TBASE registers in the PRAM were programmed with the wrong value. 7. Add the protocol type to struct us_info and updated ucc_slow_init() to use it, instead of always programming QE_CR_PROTOCOL_UNSPECIFIED. 8. Rename ucc_slow_restart_x() to ucc_slow_restart_tx() 9. Add several macros in qe.h (mostly for slow UCC support, but also to standardize some naming convention) and remove several unused macros. 10. Update ucc_geth.c to use the new macros. 11. Add ucc_slow_info.protocol to specify which QE_CR_PROTOCOL_xxx protcol to use when initializing the UCC in ucc_slow_init(). 12. Rename ucc_slow_pram.rfcr to rbmr and ucc_slow_pram.tfcr to tbmr, since these are the real names of the registers. 13. Use the setbits, clrbits, and clrsetbits where appropriate. 14. Refactor ucc_set_qe_mux_rxtx(). 15. Remove all instances of 'volatile'. 16. Simplify get_cmxucr_reg(); 17. Replace qe_mux.cmxucrX with qe_mux.cmxucr[]. 18. Updated struct ucc_geth because struct ucc_fast is not padded any more. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
361 lines
11 KiB
C
361 lines
11 KiB
C
/*
|
|
* Copyright (C) 2006 Freescale Semicondutor, Inc. All rights reserved.
|
|
*
|
|
* Authors: Shlomi Gridish <gridish@freescale.com>
|
|
* Li Yang <leoli@freescale.com>
|
|
*
|
|
* Description:
|
|
* QE UCC Fast API Set - UCC Fast specific routines implementations.
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/immap_qe.h>
|
|
#include <asm/qe.h>
|
|
|
|
#include <asm/ucc.h>
|
|
#include <asm/ucc_fast.h>
|
|
|
|
void ucc_fast_dump_regs(struct ucc_fast_private * uccf)
|
|
{
|
|
printk(KERN_INFO "UCC%u Fast registers:\n", uccf->uf_info->ucc_num);
|
|
printk(KERN_INFO "Base address: 0x%p\n", uccf->uf_regs);
|
|
|
|
printk(KERN_INFO "gumr : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->gumr, in_be32(&uccf->uf_regs->gumr));
|
|
printk(KERN_INFO "upsmr : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->upsmr, in_be32(&uccf->uf_regs->upsmr));
|
|
printk(KERN_INFO "utodr : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->utodr, in_be16(&uccf->uf_regs->utodr));
|
|
printk(KERN_INFO "udsr : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->udsr, in_be16(&uccf->uf_regs->udsr));
|
|
printk(KERN_INFO "ucce : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->ucce, in_be32(&uccf->uf_regs->ucce));
|
|
printk(KERN_INFO "uccm : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->uccm, in_be32(&uccf->uf_regs->uccm));
|
|
printk(KERN_INFO "uccs : addr=0x%p, val=0x%02x\n",
|
|
&uccf->uf_regs->uccs, uccf->uf_regs->uccs);
|
|
printk(KERN_INFO "urfb : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->urfb, in_be32(&uccf->uf_regs->urfb));
|
|
printk(KERN_INFO "urfs : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->urfs, in_be16(&uccf->uf_regs->urfs));
|
|
printk(KERN_INFO "urfet : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->urfet, in_be16(&uccf->uf_regs->urfet));
|
|
printk(KERN_INFO "urfset: addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->urfset, in_be16(&uccf->uf_regs->urfset));
|
|
printk(KERN_INFO "utfb : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->utfb, in_be32(&uccf->uf_regs->utfb));
|
|
printk(KERN_INFO "utfs : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->utfs, in_be16(&uccf->uf_regs->utfs));
|
|
printk(KERN_INFO "utfet : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->utfet, in_be16(&uccf->uf_regs->utfet));
|
|
printk(KERN_INFO "utftt : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->utftt, in_be16(&uccf->uf_regs->utftt));
|
|
printk(KERN_INFO "utpt : addr=0x%p, val=0x%04x\n",
|
|
&uccf->uf_regs->utpt, in_be16(&uccf->uf_regs->utpt));
|
|
printk(KERN_INFO "urtry : addr=0x%p, val=0x%08x\n",
|
|
&uccf->uf_regs->urtry, in_be32(&uccf->uf_regs->urtry));
|
|
printk(KERN_INFO "guemr : addr=0x%p, val=0x%02x\n",
|
|
&uccf->uf_regs->guemr, uccf->uf_regs->guemr);
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_dump_regs);
|
|
|
|
u32 ucc_fast_get_qe_cr_subblock(int uccf_num)
|
|
{
|
|
switch (uccf_num) {
|
|
case 0: return QE_CR_SUBBLOCK_UCCFAST1;
|
|
case 1: return QE_CR_SUBBLOCK_UCCFAST2;
|
|
case 2: return QE_CR_SUBBLOCK_UCCFAST3;
|
|
case 3: return QE_CR_SUBBLOCK_UCCFAST4;
|
|
case 4: return QE_CR_SUBBLOCK_UCCFAST5;
|
|
case 5: return QE_CR_SUBBLOCK_UCCFAST6;
|
|
case 6: return QE_CR_SUBBLOCK_UCCFAST7;
|
|
case 7: return QE_CR_SUBBLOCK_UCCFAST8;
|
|
default: return QE_CR_SUBBLOCK_INVALID;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_get_qe_cr_subblock);
|
|
|
|
void ucc_fast_transmit_on_demand(struct ucc_fast_private * uccf)
|
|
{
|
|
out_be16(&uccf->uf_regs->utodr, UCC_FAST_TOD);
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_transmit_on_demand);
|
|
|
|
void ucc_fast_enable(struct ucc_fast_private * uccf, enum comm_dir mode)
|
|
{
|
|
struct ucc_fast *uf_regs;
|
|
u32 gumr;
|
|
|
|
uf_regs = uccf->uf_regs;
|
|
|
|
/* Enable reception and/or transmission on this UCC. */
|
|
gumr = in_be32(&uf_regs->gumr);
|
|
if (mode & COMM_DIR_TX) {
|
|
gumr |= UCC_FAST_GUMR_ENT;
|
|
uccf->enabled_tx = 1;
|
|
}
|
|
if (mode & COMM_DIR_RX) {
|
|
gumr |= UCC_FAST_GUMR_ENR;
|
|
uccf->enabled_rx = 1;
|
|
}
|
|
out_be32(&uf_regs->gumr, gumr);
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_enable);
|
|
|
|
void ucc_fast_disable(struct ucc_fast_private * uccf, enum comm_dir mode)
|
|
{
|
|
struct ucc_fast *uf_regs;
|
|
u32 gumr;
|
|
|
|
uf_regs = uccf->uf_regs;
|
|
|
|
/* Disable reception and/or transmission on this UCC. */
|
|
gumr = in_be32(&uf_regs->gumr);
|
|
if (mode & COMM_DIR_TX) {
|
|
gumr &= ~UCC_FAST_GUMR_ENT;
|
|
uccf->enabled_tx = 0;
|
|
}
|
|
if (mode & COMM_DIR_RX) {
|
|
gumr &= ~UCC_FAST_GUMR_ENR;
|
|
uccf->enabled_rx = 0;
|
|
}
|
|
out_be32(&uf_regs->gumr, gumr);
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_disable);
|
|
|
|
int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** uccf_ret)
|
|
{
|
|
struct ucc_fast_private *uccf;
|
|
struct ucc_fast *uf_regs;
|
|
u32 gumr;
|
|
int ret;
|
|
|
|
if (!uf_info)
|
|
return -EINVAL;
|
|
|
|
/* check if the UCC port number is in range. */
|
|
if ((uf_info->ucc_num < 0) || (uf_info->ucc_num > UCC_MAX_NUM - 1)) {
|
|
printk(KERN_ERR "%s: illegal UCC number\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Check that 'max_rx_buf_length' is properly aligned (4). */
|
|
if (uf_info->max_rx_buf_length & (UCC_FAST_MRBLR_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: max_rx_buf_length not aligned\n",
|
|
__FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Validate Virtual Fifo register values */
|
|
if (uf_info->urfs < UCC_FAST_URFS_MIN_VAL) {
|
|
printk(KERN_ERR "%s: urfs is too small\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->urfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: urfs is not aligned\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->urfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: urfet is not aligned.\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->urfset & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: urfset is not aligned\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->utfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: utfs is not aligned\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->utfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: utfet is not aligned\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uf_info->utftt & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
|
|
printk(KERN_ERR "%s: utftt is not aligned\n", __FUNCTION__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
uccf = kzalloc(sizeof(struct ucc_fast_private), GFP_KERNEL);
|
|
if (!uccf) {
|
|
printk(KERN_ERR "%s: Cannot allocate private data\n",
|
|
__FUNCTION__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Fill fast UCC structure */
|
|
uccf->uf_info = uf_info;
|
|
/* Set the PHY base address */
|
|
uccf->uf_regs = ioremap(uf_info->regs, sizeof(struct ucc_fast));
|
|
if (uccf->uf_regs == NULL) {
|
|
printk(KERN_ERR "%s: Cannot map UCC registers\n", __FUNCTION__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
uccf->enabled_tx = 0;
|
|
uccf->enabled_rx = 0;
|
|
uccf->stopped_tx = 0;
|
|
uccf->stopped_rx = 0;
|
|
uf_regs = uccf->uf_regs;
|
|
uccf->p_ucce = (u32 *) & (uf_regs->ucce);
|
|
uccf->p_uccm = (u32 *) & (uf_regs->uccm);
|
|
#ifdef CONFIG_UGETH_TX_ON_DEMAND
|
|
uccf->p_utodr = (u16 *) & (uf_regs->utodr);
|
|
#endif
|
|
#ifdef STATISTICS
|
|
uccf->tx_frames = 0;
|
|
uccf->rx_frames = 0;
|
|
uccf->rx_discarded = 0;
|
|
#endif /* STATISTICS */
|
|
|
|
/* Set UCC to fast type */
|
|
ret = ucc_set_type(uf_info->ucc_num, UCC_SPEED_TYPE_FAST);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: cannot set UCC type\n", __FUNCTION__);
|
|
ucc_fast_free(uccf);
|
|
return ret;
|
|
}
|
|
|
|
uccf->mrblr = uf_info->max_rx_buf_length;
|
|
|
|
/* Set GUMR */
|
|
/* For more details see the hardware spec. */
|
|
gumr = uf_info->ttx_trx;
|
|
if (uf_info->tci)
|
|
gumr |= UCC_FAST_GUMR_TCI;
|
|
if (uf_info->cdp)
|
|
gumr |= UCC_FAST_GUMR_CDP;
|
|
if (uf_info->ctsp)
|
|
gumr |= UCC_FAST_GUMR_CTSP;
|
|
if (uf_info->cds)
|
|
gumr |= UCC_FAST_GUMR_CDS;
|
|
if (uf_info->ctss)
|
|
gumr |= UCC_FAST_GUMR_CTSS;
|
|
if (uf_info->txsy)
|
|
gumr |= UCC_FAST_GUMR_TXSY;
|
|
if (uf_info->rsyn)
|
|
gumr |= UCC_FAST_GUMR_RSYN;
|
|
gumr |= uf_info->synl;
|
|
if (uf_info->rtsm)
|
|
gumr |= UCC_FAST_GUMR_RTSM;
|
|
gumr |= uf_info->renc;
|
|
if (uf_info->revd)
|
|
gumr |= UCC_FAST_GUMR_REVD;
|
|
gumr |= uf_info->tenc;
|
|
gumr |= uf_info->tcrc;
|
|
gumr |= uf_info->mode;
|
|
out_be32(&uf_regs->gumr, gumr);
|
|
|
|
/* Allocate memory for Tx Virtual Fifo */
|
|
uccf->ucc_fast_tx_virtual_fifo_base_offset =
|
|
qe_muram_alloc(uf_info->utfs, UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
|
|
if (IS_ERR_VALUE(uccf->ucc_fast_tx_virtual_fifo_base_offset)) {
|
|
printk(KERN_ERR "%s: cannot allocate MURAM for TX FIFO\n",
|
|
__FUNCTION__);
|
|
uccf->ucc_fast_tx_virtual_fifo_base_offset = 0;
|
|
ucc_fast_free(uccf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Allocate memory for Rx Virtual Fifo */
|
|
uccf->ucc_fast_rx_virtual_fifo_base_offset =
|
|
qe_muram_alloc(uf_info->urfs +
|
|
UCC_FAST_RECEIVE_VIRTUAL_FIFO_SIZE_FUDGE_FACTOR,
|
|
UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
|
|
if (IS_ERR_VALUE(uccf->ucc_fast_rx_virtual_fifo_base_offset)) {
|
|
printk(KERN_ERR "%s: cannot allocate MURAM for RX FIFO\n",
|
|
__FUNCTION__);
|
|
uccf->ucc_fast_rx_virtual_fifo_base_offset = 0;
|
|
ucc_fast_free(uccf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Set Virtual Fifo registers */
|
|
out_be16(&uf_regs->urfs, uf_info->urfs);
|
|
out_be16(&uf_regs->urfet, uf_info->urfet);
|
|
out_be16(&uf_regs->urfset, uf_info->urfset);
|
|
out_be16(&uf_regs->utfs, uf_info->utfs);
|
|
out_be16(&uf_regs->utfet, uf_info->utfet);
|
|
out_be16(&uf_regs->utftt, uf_info->utftt);
|
|
/* utfb, urfb are offsets from MURAM base */
|
|
out_be32(&uf_regs->utfb, uccf->ucc_fast_tx_virtual_fifo_base_offset);
|
|
out_be32(&uf_regs->urfb, uccf->ucc_fast_rx_virtual_fifo_base_offset);
|
|
|
|
/* Mux clocking */
|
|
/* Grant Support */
|
|
ucc_set_qe_mux_grant(uf_info->ucc_num, uf_info->grant_support);
|
|
/* Breakpoint Support */
|
|
ucc_set_qe_mux_bkpt(uf_info->ucc_num, uf_info->brkpt_support);
|
|
/* Set Tsa or NMSI mode. */
|
|
ucc_set_qe_mux_tsa(uf_info->ucc_num, uf_info->tsa);
|
|
/* If NMSI (not Tsa), set Tx and Rx clock. */
|
|
if (!uf_info->tsa) {
|
|
/* Rx clock routing */
|
|
if ((uf_info->rx_clock != QE_CLK_NONE) &&
|
|
ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->rx_clock,
|
|
COMM_DIR_RX)) {
|
|
printk(KERN_ERR "%s: illegal value for RX clock\n",
|
|
__FUNCTION__);
|
|
ucc_fast_free(uccf);
|
|
return -EINVAL;
|
|
}
|
|
/* Tx clock routing */
|
|
if ((uf_info->tx_clock != QE_CLK_NONE) &&
|
|
ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->tx_clock,
|
|
COMM_DIR_TX)) {
|
|
printk(KERN_ERR "%s: illegal value for TX clock\n",
|
|
__FUNCTION__);
|
|
ucc_fast_free(uccf);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Set interrupt mask register at UCC level. */
|
|
out_be32(&uf_regs->uccm, uf_info->uccm_mask);
|
|
|
|
/* First, clear anything pending at UCC level,
|
|
* otherwise, old garbage may come through
|
|
* as soon as the dam is opened. */
|
|
|
|
/* Writing '1' clears */
|
|
out_be32(&uf_regs->ucce, 0xffffffff);
|
|
|
|
*uccf_ret = uccf;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_init);
|
|
|
|
void ucc_fast_free(struct ucc_fast_private * uccf)
|
|
{
|
|
if (!uccf)
|
|
return;
|
|
|
|
if (uccf->ucc_fast_tx_virtual_fifo_base_offset)
|
|
qe_muram_free(uccf->ucc_fast_tx_virtual_fifo_base_offset);
|
|
|
|
if (uccf->ucc_fast_rx_virtual_fifo_base_offset)
|
|
qe_muram_free(uccf->ucc_fast_rx_virtual_fifo_base_offset);
|
|
|
|
kfree(uccf);
|
|
}
|
|
EXPORT_SYMBOL(ucc_fast_free);
|