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[POWERPC] QE: clean up ucc_slow.c and ucc_fast.c

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Refactored and cleaned up ucc_fast.c and ucc_slow.c so that the two files
look more alike and are easier to read.  Removed uccf_printk() and related
functions, because they were just front-ends to printk().  Fixed some
spacing and tabbing issues.  Minor optimizations of some code.  Changed
the type of some variables to their proper type (mostly buffer
descriptors).

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi
2007-02-16 22:31:21 -06:00
committed by Kumar Gala
parent be156bed9e
commit 5af68af5bc
3 changed files with 118 additions and 190 deletions
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137
arch/powerpc/sysdev/qe_lib/ucc_slow.c
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@ -19,7 +19,6 @@
#include <linux/stddef.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/immap_qe.h>
#include <asm/qe.h>
@ -27,24 +26,6 @@
#include <asm/ucc.h>
#include <asm/ucc_slow.h>
#define uccs_printk(level, format, arg...) \
printk(level format "\n", ## arg)
#define uccs_dbg(format, arg...) \
uccs_printk(KERN_DEBUG , format , ## arg)
#define uccs_err(format, arg...) \
uccs_printk(KERN_ERR , format , ## arg)
#define uccs_info(format, arg...) \
uccs_printk(KERN_INFO , format , ## arg)
#define uccs_warn(format, arg...) \
uccs_printk(KERN_WARNING , format , ## arg)
#ifdef UCCS_VERBOSE_DEBUG
#define uccs_vdbg uccs_dbg
#else
#define uccs_vdbg(fmt, args...) do { } while (0)
#endif /* UCCS_VERBOSE_DEBUG */
u32 ucc_slow_get_qe_cr_subblock(int uccs_num)
{
switch (uccs_num) {
@ -135,51 +116,53 @@ void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode)
int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** uccs_ret)
{
struct ucc_slow_private *uccs;
u32 i;
struct ucc_slow *us_regs;
u32 gumr;
u8 function_code = 0;
u8 *bd;
struct ucc_slow_private *uccs;
struct qe_bd *bd;
u32 id;
u32 command;
int ret;
uccs_vdbg("%s: IN", __FUNCTION__);
int ret = 0;
if (!us_info)
return -EINVAL;
/* check if the UCC port number is in range. */
if ((us_info->ucc_num < 0) || (us_info->ucc_num > UCC_MAX_NUM - 1)) {
uccs_err("ucc_slow_init: Illegal UCC number!");
printk(KERN_ERR "%s: illegal UCC number", __FUNCTION__);
return -EINVAL;
}
/*
* Set mrblr
* Check that 'max_rx_buf_length' is properly aligned (4), unless
* rfw is 1, meaning that QE accepts one byte at a time, unlike normal
* rfw is 1, meaning that QE accepts one byte at a time, unlike normal
* case when QE accepts 32 bits at a time.
*/
if ((!us_info->rfw) &&
(us_info->max_rx_buf_length & (UCC_SLOW_MRBLR_ALIGNMENT - 1))) {
uccs_err("max_rx_buf_length not aligned.");
printk(KERN_ERR "max_rx_buf_length not aligned.");
return -EINVAL;
}
uccs = kzalloc(sizeof(struct ucc_slow_private), GFP_KERNEL);
if (!uccs) {
uccs_err
("ucc_slow_init: No memory for UCC slow data structure!");
printk(KERN_ERR "%s: Cannot allocate private data", __FUNCTION__);
return -ENOMEM;
}
/* Fill slow UCC structure */
uccs->us_info = us_info;
/* Set the PHY base address */
uccs->us_regs = ioremap(us_info->regs, sizeof(struct ucc_slow));
if (uccs->us_regs == NULL) {
printk(KERN_ERR "%s: Cannot map UCC registers", __FUNCTION__);
return -ENOMEM;
}
uccs->saved_uccm = 0;
uccs->p_rx_frame = 0;
uccs->us_regs = us_info->regs;
us_regs = uccs->us_regs;
uccs->p_ucce = (u16 *) & (us_regs->ucce);
uccs->p_uccm = (u16 *) & (us_regs->uccm);
@ -190,24 +173,22 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
#endif /* STATISTICS */
/* Get PRAM base */
uccs->us_pram_offset = qe_muram_alloc(UCC_SLOW_PRAM_SIZE,
ALIGNMENT_OF_UCC_SLOW_PRAM);
uccs->us_pram_offset =
qe_muram_alloc(UCC_SLOW_PRAM_SIZE, ALIGNMENT_OF_UCC_SLOW_PRAM);
if (IS_MURAM_ERR(uccs->us_pram_offset)) {
uccs_err
("ucc_slow_init: Can not allocate MURAM memory "
"for Slow UCC.");
printk(KERN_ERR "%s: cannot allocate MURAM for PRAM", __FUNCTION__);
ucc_slow_free(uccs);
return -ENOMEM;
}
id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num);
qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, id, QE_CR_PROTOCOL_UNSPECIFIED,
(u32) uccs->us_pram_offset);
uccs->us_pram_offset);
uccs->us_pram = qe_muram_addr(uccs->us_pram_offset);
/* Init Guemr register */
if ((ret = ucc_init_guemr((struct ucc_common *) (us_info->regs)))) {
uccs_err("ucc_slow_init: Could not init the guemr register.");
printk(KERN_ERR "%s: cannot init GUEMR", __FUNCTION__);
ucc_slow_free(uccs);
return ret;
}
@ -216,7 +197,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
if ((ret = ucc_set_type(us_info->ucc_num,
(struct ucc_common *) (us_info->regs),
UCC_SPEED_TYPE_SLOW))) {
uccs_err("ucc_slow_init: Could not init the guemr register.");
printk(KERN_ERR "%s: cannot set UCC type", __FUNCTION__);
ucc_slow_free(uccs);
return ret;
}
@ -230,7 +211,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
qe_muram_alloc(us_info->rx_bd_ring_len * sizeof(struct qe_bd),
QE_ALIGNMENT_OF_BD);
if (IS_MURAM_ERR(uccs->rx_base_offset)) {
uccs_err("ucc_slow_init: No memory for Rx BD's.");
printk(KERN_ERR "%s: cannot allocate RX BDs", __FUNCTION__);
uccs->rx_base_offset = 0;
ucc_slow_free(uccs);
return -ENOMEM;
@ -240,7 +221,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
qe_muram_alloc(us_info->tx_bd_ring_len * sizeof(struct qe_bd),
QE_ALIGNMENT_OF_BD);
if (IS_MURAM_ERR(uccs->tx_base_offset)) {
uccs_err("ucc_slow_init: No memory for Tx BD's.");
printk(KERN_ERR "%s: cannot allocate TX BDs", __FUNCTION__);
uccs->tx_base_offset = 0;
ucc_slow_free(uccs);
return -ENOMEM;
@ -248,34 +229,33 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
/* Init Tx bds */
bd = uccs->confBd = uccs->tx_bd = qe_muram_addr(uccs->tx_base_offset);
for (i = 0; i < us_info->tx_bd_ring_len; i++) {
for (i = 0; i < us_info->tx_bd_ring_len - 1; i++) {
/* clear bd buffer */
out_be32(&(((struct qe_bd *)bd)->buf), 0);
out_be32(&bd->buf, 0);
/* set bd status and length */
out_be32((u32*)bd, 0);
bd += sizeof(struct qe_bd);
out_be32((u32 *) bd, 0);
bd++;
}
bd -= sizeof(struct qe_bd);
/* set bd status and length */
out_be32((u32*)bd, T_W); /* for last BD set Wrap bit */
/* for last BD set Wrap bit */
out_be32(&bd->buf, 0);
out_be32((u32 *) bd, cpu_to_be32(T_W));
/* Init Rx bds */
bd = uccs->rx_bd = qe_muram_addr(uccs->rx_base_offset);
for (i = 0; i < us_info->rx_bd_ring_len; i++) {
for (i = 0; i < us_info->rx_bd_ring_len - 1; i++) {
/* set bd status and length */
out_be32((u32*)bd, 0);
/* clear bd buffer */
out_be32(&(((struct qe_bd *)bd)->buf), 0);
bd += sizeof(struct qe_bd);
out_be32(&bd->buf, 0);
bd++;
}
bd -= sizeof(struct qe_bd);
/* set bd status and length */
out_be32((u32*)bd, R_W); /* for last BD set Wrap bit */
/* for last BD set Wrap bit */
out_be32((u32*)bd, cpu_to_be32(R_W));
out_be32(&bd->buf, 0);
/* Set GUMR (For more details see the hardware spec.). */
/* gumr_h */
gumr = 0;
gumr |= us_info->tcrc;
gumr = us_info->tcrc;
if (us_info->cdp)
gumr |= UCC_SLOW_GUMR_H_CDP;
if (us_info->ctsp)
@ -295,7 +275,8 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
out_be32(&us_regs->gumr_h, gumr);
/* gumr_l */
gumr = 0;
gumr = us_info->tdcr | us_info->rdcr | us_info->tenc | us_info->renc |
us_info->diag | us_info->mode;
if (us_info->tci)
gumr |= UCC_SLOW_GUMR_L_TCI;
if (us_info->rinv)
@ -304,23 +285,14 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
gumr |= UCC_SLOW_GUMR_L_TINV;
if (us_info->tend)
gumr |= UCC_SLOW_GUMR_L_TEND;
gumr |= us_info->tdcr;
gumr |= us_info->rdcr;
gumr |= us_info->tenc;
gumr |= us_info->renc;
gumr |= us_info->diag;
gumr |= us_info->mode;
out_be32(&us_regs->gumr_l, gumr);
/* Function code registers */
/* function_code has initial value 0 */
/* if the data is in cachable memory, the 'global' */
/* in the function code should be set. */
function_code |= us_info->data_mem_part;
function_code |= QE_BMR_BYTE_ORDER_BO_MOT; /* Required for QE */
uccs->us_pram->tfcr = function_code;
uccs->us_pram->rfcr = function_code;
uccs->us_pram->tfcr = uccs->us_pram->rfcr =
us_info->data_mem_part | QE_BMR_BYTE_ORDER_BO_MOT;
/* rbase, tbase are offsets from MURAM base */
out_be16(&uccs->us_pram->rbase, uccs->us_pram_offset);
@ -336,34 +308,29 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
/* If NMSI (not Tsa), set Tx and Rx clock. */
if (!us_info->tsa) {
/* Rx clock routing */
if (ucc_set_qe_mux_rxtx
(us_info->ucc_num, us_info->rx_clock, COMM_DIR_RX)) {
uccs_err
("ucc_slow_init: Illegal value for parameter"
" 'RxClock'.");
if (ucc_set_qe_mux_rxtx(us_info->ucc_num, us_info->rx_clock,
COMM_DIR_RX)) {
printk(KERN_ERR "%s: illegal value for RX clock",
__FUNCTION__);
ucc_slow_free(uccs);
return -EINVAL;
}
/* Tx clock routing */
if (ucc_set_qe_mux_rxtx(us_info->ucc_num,
us_info->tx_clock, COMM_DIR_TX)) {
uccs_err
("ucc_slow_init: Illegal value for parameter "
"'TxClock'.");
if (ucc_set_qe_mux_rxtx(us_info->ucc_num, us_info->tx_clock,
COMM_DIR_TX)) {
printk(KERN_ERR "%s: illegal value for TX clock",
__FUNCTION__);
ucc_slow_free(uccs);
return -EINVAL;
}
}
/*
* INTERRUPTS
*/
/* Set interrupt mask register at UCC level. */
out_be16(&us_regs->uccm, us_info->uccm_mask);
/* First, clear anything pending at UCC level, */
/* otherwise, old garbage may come through */
/* as soon as the dam is opened. */
/* First, clear anything pending at UCC level,
* otherwise, old garbage may come through
* as soon as the dam is opened. */
/* Writing '1' clears */
out_be16(&us_regs->ucce, 0xffff);
@ -400,3 +367,5 @@ void ucc_slow_free(struct ucc_slow_private * uccs)
kfree(uccs);
}