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Date: Fri, 16 Jan 2009 13:35:43 -0500 (EST)
From: Nicolas Pitre <nico@....org>
To: Vernon Sauder <vernoninhand@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH] smc91x: enable ethtool EEPROM interface
On Fri, 16 Jan 2009, Vernon Sauder wrote:
> Sorry about that. This was an old patch before bank checking. Here is an update.
>
> From: Vernon Sauder <vsauder@...and.com>
> Date: Fri, 16 Jan 2009 12:05:42 -0500
> Subject: [PATCH] smc91x: enable ethtool EEPROM interface
>
>
> Signed-off-by: Vernon Sauder <vsauder@...and.com>
> ---
> drivers/net/smc91x.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++-
> drivers/net/smc91x.h | 10 +++++
> 2 files changed, 116 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/smc91x.c b/drivers/net/smc91x.c
> index b215a8d..ba802f5 100644
> --- a/drivers/net/smc91x.c
> +++ b/drivers/net/smc91x.c
> @@ -1643,6 +1643,109 @@ static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
> lp->msg_enable = level;
> }
>
> +static int smc_write_eeprom_word(struct net_device *dev, u16 addr, u16 word)
> +{
> + struct smc_local *lp = netdev_priv(dev);
> + void __iomem *ioaddr = lp->base;
> + spin_lock_irq(&lp->lock);
> + /* load word into GP register */
> + SMC_SELECT_BANK(lp, 1);
> + SMC_SET_GP(lp, word);
> + /* set the address to put the data in EEPROM */
> + SMC_SELECT_BANK(lp, 2);
> + SMC_SET_PTR(lp, addr);
> + /* tell it to write */
> + SMC_SELECT_BANK(lp, 1);
> + u16 ctl = SMC_GET_CTL(lp);
> + SMC_SET_CTL(lp, ctl | (CTL_EEPROM_SELECT | CTL_STORE));
> + /* wait for it to finish */
> + do {
> + udelay(1);
> + } while (SMC_GET_CTL(lp) & CTL_STORE);
> + /* clean up */
> + SMC_SET_CTL(lp, ctl);
> + SMC_SELECT_BANK(lp, 2);
> + spin_unlock_irq(&lp->lock);
> + return 0;
> +}
> +
> +static int smc_read_eeprom_word(struct net_device *dev, u16 addr, u16 *word)
> +{
> + struct smc_local *lp = netdev_priv(dev);
> + void __iomem *ioaddr = lp->base;
> +
> + spin_lock_irq(&lp->lock);
> + /* set the EEPROM address to get the data from */
> + SMC_SELECT_BANK(lp, 2);
> + SMC_SET_PTR(lp, addr | PTR_READ);
> + /* tell it to load */
> + SMC_SELECT_BANK(lp, 1);
> + SMC_SET_GP(lp, 0xffff); /* init to known */
> + u16 ctl = SMC_GET_CTL(lp);
Don't put variable declaration in the middle of code sequences. Not all
gcc versions support C++ variable declaration style.
> + SMC_SET_CTL(lp, ctl | (CTL_EEPROM_SELECT | CTL_RELOAD));
> + /* wait for it to finish */
> + do {
> + udelay(1);
> + } while (SMC_GET_CTL(lp) & CTL_RELOAD);
> + /* read word from GP register */
> + *word = SMC_GET_GP(lp);
> + /* clean up */
> + SMC_SET_CTL(lp, ctl);
> + SMC_SELECT_BANK(lp, 2);
> + spin_unlock_irq(&lp->lock);
> + return 0;
> +}
> +
> +static int smc_ethtool_geteeprom_len(struct net_device *dev)
> +{
> + return 0x23 * 2;
> +}
> +
> +static int smc_ethtool_geteeprom(struct net_device *dev,
> + struct ethtool_eeprom *eeprom, u8 *data)
> +{
> + int i, ret;
> +
> + DBG(1, "Reading %d bytes at %d(0x%x)\n",
> + eeprom->len, eeprom->offset, eeprom->offset);
> + int imax = smc_ethtool_geteeprom_len(dev);
> + for (i = 0; i < eeprom->len; i += 2) {
> + int offset = i + eeprom->offset;
> + if (offset > imax)
> + break;
> + u16 wbuf;
Same here.
> + ret = smc_read_eeprom_word(dev, offset >> 1, &wbuf);
> + if (ret != 0)
> + return ret;
> + DBG(2, "Read 0x%x from 0x%x\n", wbuf, offset >> 1);
> + data[i] = (wbuf >> 8) & 0xff;
> + data[i+1] = wbuf & 0xff;
> + }
> + return 0;
> +}
> +
> +static int smc_ethtool_seteeprom(struct net_device *dev,
> + struct ethtool_eeprom *eeprom, u8 *data)
> +{
> + int i, ret;
> +
> + DBG(1, "Writing %d bytes to %d(0x%x)\n",
> + eeprom->len, eeprom->offset, eeprom->offset);
> + int imax = smc_ethtool_geteeprom_len(dev);
Same here.
> + for (i = 0; i < eeprom->len; i += 2) {
> + int offset = i + eeprom->offset;
> + if (offset > imax)
> + break;
> + u16 wbuf = (data[i] << 8) | data[i + 1];
Same here.
With those fixed you can resubmit with my ACK.
Nicolas
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