add some work-in-progress patches for ath5k stability and performance

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14277 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 1203 insertions, 0 deletions

diff --git a/package/mac80211/patches/320-rx_dma_unmap.patch b/package/mac80211/patches/320-rx_dma_unmap.patch
new file mode 100644
index 0000000000..f7cd62a7ce
--- /dev/null
+++ b/package/mac80211/patches/320-rx_dma_unmap.patch
@@ -0,0 +1,37 @@
+When freeing rx dma descriptors, use the right buffer size.
+Fixes kernel oopses on module unload on ixp4xx and most likely
+other platforms as well.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+--- a/drivers/net/wireless/ath5k/base.c
++++ b/drivers/net/wireless/ath5k/base.c
+@@ -308,6 +308,19 @@ static inline void ath5k_txbuf_free(stru
+ 	bf->skb = NULL;
+ }
+ 
++static inline void ath5k_rxbuf_free(struct ath5k_softc *sc,
++				struct ath5k_buf *bf)
++{
++	BUG_ON(!bf);
++	if (!bf->skb)
++		return;
++	pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
++			PCI_DMA_FROMDEVICE);
++	dev_kfree_skb_any(bf->skb);
++	bf->skb = NULL;
++}
++
++
+ /* Queues setup */
+ static struct 	ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
+ 				int qtype, int subtype);
+@@ -1341,7 +1354,7 @@ ath5k_desc_free(struct ath5k_softc *sc, 
+ 	list_for_each_entry(bf, &sc->txbuf, list)
+ 		ath5k_txbuf_free(sc, bf);
+ 	list_for_each_entry(bf, &sc->rxbuf, list)
+-		ath5k_txbuf_free(sc, bf);
++		ath5k_rxbuf_free(sc, bf);
+ 
+ 	/* Free memory associated with all descriptors */
+ 	pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
diff --git a/package/mac80211/patches/330-ath5k_eeprom.patch b/package/mac80211/patches/330-ath5k_eeprom.patch
new file mode 100644
index 0000000000..a3a0285ae8
--- /dev/null
+++ b/package/mac80211/patches/330-ath5k_eeprom.patch
@@ -0,0 +1,494 @@
+Clean up the eeprom parsing code and prepare the pdgain
+data for 2413, which will be required for power calibration code.
+Also clean up some ugly line wrapping to make the code easier on
+the eyes.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+--- a/drivers/net/wireless/ath5k/eeprom.c
++++ b/drivers/net/wireless/ath5k/eeprom.c
+@@ -541,31 +541,30 @@ ath5k_eeprom_read_freq_list(struct ath5k
+ {
+ 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
+ 	int o = *offset;
+-	int i = 0;
++	int i;
+ 	u8 freq1, freq2;
+ 	int ret;
+ 	u16 val;
+ 
++	ee->ee_n_piers[mode] = 0;
+ 	while(i < max) {
+ 		AR5K_EEPROM_READ(o++, val);
+ 
+-		freq1 = (val >> 8) & 0xff;
+-		freq2 = val & 0xff;
+-
+-		if (freq1) {
+-			pc[i++].freq = ath5k_eeprom_bin2freq(ee,
+-					freq1, mode);
+-			ee->ee_n_piers[mode]++;
+-		}
++		freq1 = val & 0xff;
++		if (!freq1)
++			break;
+ 
+-		if (freq2) {
+-			pc[i++].freq = ath5k_eeprom_bin2freq(ee,
+-					freq2, mode);
+-			ee->ee_n_piers[mode]++;
+-		}
++		pc[i++].freq = ath5k_eeprom_bin2freq(ee,
++				freq1, mode);
++		ee->ee_n_piers[mode]++;
+ 
+-		if (!freq1 || !freq2)
++		freq2 = (val >> 8) & 0xff;
++		if (!freq2)
+ 			break;
++
++		pc[i++].freq = ath5k_eeprom_bin2freq(ee,
++				freq2, mode);
++		ee->ee_n_piers[mode]++;
+ 	}
+ 
+ 	/* return new offset */
+@@ -918,84 +917,46 @@ ath5k_cal_data_offset_2413(struct ath5k_
+  * curves on eeprom. The final curve (higher power) has an extra
+  * point for better accuracy like RF5112.
+  */
++
+ static int
+-ath5k_eeprom_read_pcal_info_2413(struct ath5k_hw *ah, int mode)
++ath5k_eeprom_parse_pcal_info_2413(struct ath5k_hw *ah, int mode, u32 offset,
++                                  struct ath5k_chan_pcal_info *chinfo)
+ {
+ 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
+-	struct ath5k_chan_pcal_info_rf2413 *chan_pcal_info;
+-	struct ath5k_chan_pcal_info *gen_chan_info;
+-	unsigned int i, c;
+-	u32 offset;
++	struct ath5k_chan_pcal_info_rf2413 *pcinfo;
++	unsigned int i;
+ 	int ret;
+ 	u16 val;
+-	u8 pd_gains = 0;
+-
+-	if (ee->ee_x_gain[mode] & 0x1) pd_gains++;
+-	if ((ee->ee_x_gain[mode] >> 1) & 0x1) pd_gains++;
+-	if ((ee->ee_x_gain[mode] >> 2) & 0x1) pd_gains++;
+-	if ((ee->ee_x_gain[mode] >> 3) & 0x1) pd_gains++;
+-	ee->ee_pd_gains[mode] = pd_gains;
++	u8 pd_gains;
+ 
+-	offset = ath5k_cal_data_offset_2413(ee, mode);
+-	ee->ee_n_piers[mode] = 0;
+-	switch (mode) {
+-	case AR5K_EEPROM_MODE_11A:
+-		if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
+-			return 0;
+-
+-		ath5k_eeprom_init_11a_pcal_freq(ah, offset);
+-		offset += AR5K_EEPROM_N_5GHZ_CHAN / 2;
+-		gen_chan_info = ee->ee_pwr_cal_a;
+-		break;
+-	case AR5K_EEPROM_MODE_11B:
+-		if (!AR5K_EEPROM_HDR_11B(ee->ee_header))
+-			return 0;
+-
+-		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
+-		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
+-		gen_chan_info = ee->ee_pwr_cal_b;
+-		break;
+-	case AR5K_EEPROM_MODE_11G:
+-		if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
+-			return 0;
+-
+-		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
+-		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
+-		gen_chan_info = ee->ee_pwr_cal_g;
+-		break;
+-	default:
+-		return -EINVAL;
+-	}
++	pd_gains = ee->ee_pd_gains[mode];
+ 
+ 	if (pd_gains == 0)
+ 		return 0;
+ 
+ 	for (i = 0; i < ee->ee_n_piers[mode]; i++) {
+-		chan_pcal_info = &gen_chan_info[i].rf2413_info;
++		pcinfo = &chinfo[i].rf2413_info;
+ 
+ 		/*
+ 		 * Read pwr_i, pddac_i and the first
+ 		 * 2 pd points (pwr, pddac)
+ 		 */
+ 		AR5K_EEPROM_READ(offset++, val);
+-		chan_pcal_info->pwr_i[0] = val & 0x1f;
+-		chan_pcal_info->pddac_i[0] = (val >> 5) & 0x7f;
+-		chan_pcal_info->pwr[0][0] =
+-					(val >> 12) & 0xf;
++		pcinfo->pwr_i[0] = val & 0x1f;
++		pcinfo->pddac_i[0] = (val >> 5) & 0x7f;
++		pcinfo->pwr[0][0] = (val >> 12) & 0xf;
+ 
+ 		AR5K_EEPROM_READ(offset++, val);
+-		chan_pcal_info->pddac[0][0] = val & 0x3f;
+-		chan_pcal_info->pwr[0][1] = (val >> 6) & 0xf;
+-		chan_pcal_info->pddac[0][1] =
+-					(val >> 10) & 0x3f;
++		pcinfo->pddac[0][0] = val & 0x3f;
++		pcinfo->pwr[0][1] = (val >> 6) & 0xf;
++		pcinfo->pddac[0][1] = (val >> 10) & 0x3f;
+ 
+ 		AR5K_EEPROM_READ(offset++, val);
+-		chan_pcal_info->pwr[0][2] = val & 0xf;
+-		chan_pcal_info->pddac[0][2] =
+-					(val >> 4) & 0x3f;
++		pcinfo->pwr[0][2] = val & 0xf;
++		pcinfo->pddac[0][2] = (val >> 4) & 0x3f;
+ 
+-		chan_pcal_info->pwr[0][3] = 0;
+-		chan_pcal_info->pddac[0][3] = 0;
++		pcinfo->pwr[0][3] = 0;
++		pcinfo->pddac[0][3] = 0;
+ 
+ 		if (pd_gains > 1) {
+ 			/*
+@@ -1003,44 +964,36 @@ ath5k_eeprom_read_pcal_info_2413(struct 
+ 			 * so it only has 2 pd points.
+ 			 * Continue wih pd gain 1.
+ 			 */
+-			chan_pcal_info->pwr_i[1] = (val >> 10) & 0x1f;
++			pcinfo->pwr_i[1] = (val >> 10) & 0x1f;
+ 
+-			chan_pcal_info->pddac_i[1] = (val >> 15) & 0x1;
++			pcinfo->pddac_i[1] = (val >> 15) & 0x1;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac_i[1] |= (val & 0x3F) << 1;
++			pcinfo->pddac_i[1] |= (val & 0x3F) << 1;
+ 
+-			chan_pcal_info->pwr[1][0] = (val >> 6) & 0xf;
+-			chan_pcal_info->pddac[1][0] =
+-						(val >> 10) & 0x3f;
++			pcinfo->pwr[1][0] = (val >> 6) & 0xf;
++			pcinfo->pddac[1][0] = (val >> 10) & 0x3f;
+ 
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pwr[1][1] = val & 0xf;
+-			chan_pcal_info->pddac[1][1] =
+-						(val >> 4) & 0x3f;
+-			chan_pcal_info->pwr[1][2] =
+-						(val >> 10) & 0xf;
++			pcinfo->pwr[1][1] = val & 0xf;
++			pcinfo->pddac[1][1] = (val >> 4) & 0x3f;
++			pcinfo->pwr[1][2] = (val >> 10) & 0xf;
+ 
+-			chan_pcal_info->pddac[1][2] =
+-						(val >> 14) & 0x3;
++			pcinfo->pddac[1][2] = (val >> 14) & 0x3;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac[1][2] |=
+-						(val & 0xF) << 2;
++			pcinfo->pddac[1][2] |= (val & 0xF) << 2;
+ 
+-			chan_pcal_info->pwr[1][3] = 0;
+-			chan_pcal_info->pddac[1][3] = 0;
++			pcinfo->pwr[1][3] = 0;
++			pcinfo->pddac[1][3] = 0;
+ 		} else if (pd_gains == 1) {
+ 			/*
+ 			 * Pd gain 0 is the last one so
+ 			 * read the extra point.
+ 			 */
+-			chan_pcal_info->pwr[0][3] =
+-						(val >> 10) & 0xf;
++			pcinfo->pwr[0][3] = (val >> 10) & 0xf;
+ 
+-			chan_pcal_info->pddac[0][3] =
+-						(val >> 14) & 0x3;
++			pcinfo->pddac[0][3] = (val >> 14) & 0x3;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac[0][3] |=
+-						(val & 0xF) << 2;
++			pcinfo->pddac[0][3] |= (val & 0xF) << 2;
+ 		}
+ 
+ 		/*
+@@ -1048,105 +1001,159 @@ ath5k_eeprom_read_pcal_info_2413(struct 
+ 		 * as above.
+ 		 */
+ 		if (pd_gains > 2) {
+-			chan_pcal_info->pwr_i[2] = (val >> 4) & 0x1f;
+-			chan_pcal_info->pddac_i[2] = (val >> 9) & 0x7f;
++			pcinfo->pwr_i[2] = (val >> 4) & 0x1f;
++			pcinfo->pddac_i[2] = (val >> 9) & 0x7f;
+ 
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pwr[2][0] =
+-						(val >> 0) & 0xf;
+-			chan_pcal_info->pddac[2][0] =
+-						(val >> 4) & 0x3f;
+-			chan_pcal_info->pwr[2][1] =
+-						(val >> 10) & 0xf;
+-
+-			chan_pcal_info->pddac[2][1] =
+-						(val >> 14) & 0x3;
+-			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac[2][1] |=
+-						(val & 0xF) << 2;
+-
+-			chan_pcal_info->pwr[2][2] =
+-						(val >> 4) & 0xf;
+-			chan_pcal_info->pddac[2][2] =
+-						(val >> 8) & 0x3f;
++			pcinfo->pwr[2][0] = (val >> 0) & 0xf;
++			pcinfo->pddac[2][0] = (val >> 4) & 0x3f;
++			pcinfo->pwr[2][1] = (val >> 10) & 0xf;
+ 
+-			chan_pcal_info->pwr[2][3] = 0;
+-			chan_pcal_info->pddac[2][3] = 0;
++			pcinfo->pddac[2][1] = (val >> 14) & 0x3;
++			AR5K_EEPROM_READ(offset++, val);
++			pcinfo->pddac[2][1] |= (val & 0xF) << 2;
++
++			pcinfo->pwr[2][2] = (val >> 4) & 0xf;
++			pcinfo->pddac[2][2] = (val >> 8) & 0x3f;
++
++			pcinfo->pwr[2][3] = 0;
++			pcinfo->pddac[2][3] = 0;
+ 		} else if (pd_gains == 2) {
+-			chan_pcal_info->pwr[1][3] =
+-						(val >> 4) & 0xf;
+-			chan_pcal_info->pddac[1][3] =
+-						(val >> 8) & 0x3f;
++			pcinfo->pwr[1][3] = (val >> 4) & 0xf;
++			pcinfo->pddac[1][3] = (val >> 8) & 0x3f;
+ 		}
+ 
+ 		if (pd_gains > 3) {
+-			chan_pcal_info->pwr_i[3] = (val >> 14) & 0x3;
++			pcinfo->pwr_i[3] = (val >> 14) & 0x3;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pwr_i[3] |= ((val >> 0) & 0x7) << 2;
++			pcinfo->pwr_i[3] |= ((val >> 0) & 0x7) << 2;
+ 
+-			chan_pcal_info->pddac_i[3] = (val >> 3) & 0x7f;
+-			chan_pcal_info->pwr[3][0] =
+-						(val >> 10) & 0xf;
+-			chan_pcal_info->pddac[3][0] =
+-						(val >> 14) & 0x3;
++			pcinfo->pddac_i[3] = (val >> 3) & 0x7f;
++			pcinfo->pwr[3][0] = (val >> 10) & 0xf;
++			pcinfo->pddac[3][0] = (val >> 14) & 0x3;
+ 
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac[3][0] |=
+-						(val & 0xF) << 2;
+-			chan_pcal_info->pwr[3][1] =
+-						(val >> 4) & 0xf;
+-			chan_pcal_info->pddac[3][1] =
+-						(val >> 8) & 0x3f;
++			pcinfo->pddac[3][0] |= (val & 0xF) << 2;
++			pcinfo->pwr[3][1] = (val >> 4) & 0xf;
++			pcinfo->pddac[3][1] = (val >> 8) & 0x3f;
+ 
+-			chan_pcal_info->pwr[3][2] =
+-						(val >> 14) & 0x3;
++			pcinfo->pwr[3][2] = (val >> 14) & 0x3;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pwr[3][2] |=
+-						((val >> 0) & 0x3) << 2;
++			pcinfo->pwr[3][2] |= ((val >> 0) & 0x3) << 2;
+ 
+-			chan_pcal_info->pddac[3][2] =
+-						(val >> 2) & 0x3f;
+-			chan_pcal_info->pwr[3][3] =
+-						(val >> 8) & 0xf;
++			pcinfo->pddac[3][2] = (val >> 2) & 0x3f;
++			pcinfo->pwr[3][3] = (val >> 8) & 0xf;
+ 
+-			chan_pcal_info->pddac[3][3] =
+-						(val >> 12) & 0xF;
++			pcinfo->pddac[3][3] = (val >> 12) & 0xF;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pddac[3][3] |=
+-						((val >> 0) & 0x3) << 4;
++			pcinfo->pddac[3][3] |= ((val >> 0) & 0x3) << 4;
+ 		} else if (pd_gains == 3) {
+-			chan_pcal_info->pwr[2][3] =
+-						(val >> 14) & 0x3;
++			pcinfo->pwr[2][3] = (val >> 14) & 0x3;
+ 			AR5K_EEPROM_READ(offset++, val);
+-			chan_pcal_info->pwr[2][3] |=
+-						((val >> 0) & 0x3) << 2;
++			pcinfo->pwr[2][3] |= ((val >> 0) & 0x3) << 2;
+ 
+-			chan_pcal_info->pddac[2][3] =
+-						(val >> 2) & 0x3f;
++			pcinfo->pddac[2][3] = (val >> 2) & 0x3f;
+ 		}
++	}
++	return 0;
++}
++
++static int
++ath5k_eeprom_convert_pcal_info_2413(struct ath5k_hw *ah, int mode,
++                                    struct ath5k_chan_pcal_info *chinfo,
++                                    unsigned int *xgains)
++{
++	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
++	struct ath5k_chan_pcal_info_rf2413 *pcinfo;
++	unsigned int i, j, k;
+ 
+-		for (c = 0; c < pd_gains; c++) {
+-			/* Recreate pwr table for this channel using pwr steps */
+-			chan_pcal_info->pwr[c][0] += chan_pcal_info->pwr_i[c] * 2;
+-			chan_pcal_info->pwr[c][1] += chan_pcal_info->pwr[c][0];
+-			chan_pcal_info->pwr[c][2] += chan_pcal_info->pwr[c][1];
+-			chan_pcal_info->pwr[c][3] += chan_pcal_info->pwr[c][2];
+-			if (chan_pcal_info->pwr[c][3] == chan_pcal_info->pwr[c][2])
+-				chan_pcal_info->pwr[c][3] = 0;
+-
+-			/* Recreate pddac table for this channel using pddac steps */
+-			chan_pcal_info->pddac[c][0] += chan_pcal_info->pddac_i[c];
+-			chan_pcal_info->pddac[c][1] += chan_pcal_info->pddac[c][0];
+-			chan_pcal_info->pddac[c][2] += chan_pcal_info->pddac[c][1];
+-			chan_pcal_info->pddac[c][3] += chan_pcal_info->pddac[c][2];
+-			if (chan_pcal_info->pddac[c][3] == chan_pcal_info->pddac[c][2])
+-				chan_pcal_info->pddac[c][3] = 0;
++	/* prepare the raw values */
++	for (i = 0; i < ee->ee_n_piers[mode]; i++) {
++		pcinfo = &chinfo[i].rf2413_info;
++		for (j = 0; j < ee->ee_pd_gains[mode]; j++) {
++			unsigned int idx = xgains[j];
++			struct ath5k_pdgain_info *pd = &pcinfo->pdgains[idx];
++
++			/* one more point for the highest power (lowest gain) */
++			if (j == ee->ee_pd_gains[mode] - 1) {
++				pd->n_vpd = AR5K_EEPROM_N_PD_POINTS;
++			} else {
++				pd->n_vpd = AR5K_EEPROM_N_PD_POINTS - 1;
++			}
++
++			pd->vpd[0] = pcinfo->pddac_i[j];
++			pd->pwr_t4[0] = 4 * pcinfo->pwr_i[j];
++			for (k = 1; k < pd->n_vpd; k++) {
++				pd->pwr_t4[k] = pd->pwr_t4[k - 1] + 2 * pcinfo->pwr[j][k - 1];
++				pd->vpd[k] = pd->vpd[k - 1] + pcinfo->pddac[j][k - 1];
++			}
+ 		}
+ 	}
+ 
+ 	return 0;
+ }
+ 
++static int
++ath5k_eeprom_read_pcal_info_2413(struct ath5k_hw *ah, int mode)
++{
++	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
++	struct ath5k_chan_pcal_info *chinfo;
++	unsigned int xgains[AR5K_EEPROM_N_PD_GAINS];
++	u32 offset;
++	u8 pd_gains = 0;
++	int i, ret;
++
++	memset(xgains, 0, sizeof(xgains));
++	for (i = 0; i < AR5K_EEPROM_N_PD_GAINS; i++) {
++		int idx = AR5K_EEPROM_N_PD_GAINS - i - 1;
++
++		if ((ee->ee_x_gain[mode] >> idx) & 0x1)
++			xgains[pd_gains++] = idx;
++	}
++	ee->ee_pd_gains[mode] = pd_gains;
++
++	offset = ath5k_cal_data_offset_2413(ee, mode);
++	switch (mode) {
++	case AR5K_EEPROM_MODE_11A:
++		if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
++			return 0;
++
++		ath5k_eeprom_init_11a_pcal_freq(ah, offset);
++		offset += AR5K_EEPROM_N_5GHZ_CHAN / 2;
++		chinfo = ee->ee_pwr_cal_a;
++		break;
++	case AR5K_EEPROM_MODE_11B:
++		if (!AR5K_EEPROM_HDR_11B(ee->ee_header))
++			return 0;
++
++		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
++		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
++		chinfo = ee->ee_pwr_cal_b;
++		break;
++	case AR5K_EEPROM_MODE_11G:
++		if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
++			return 0;
++
++		ath5k_eeprom_init_11bg_2413(ah, mode, offset);
++		offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
++		chinfo = ee->ee_pwr_cal_g;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++
++	ret = ath5k_eeprom_parse_pcal_info_2413(ah, mode, offset, chinfo);
++	if (ret)
++		return ret;
++
++	ret = ath5k_eeprom_convert_pcal_info_2413(ah, mode, chinfo, xgains);
++	if (ret)
++		return ret;
++
++	return 0;
++}
++
+ /*
+  * Read per rate target power (this is the maximum tx power
+  * supported by the card). This info is used when setting
+@@ -1264,6 +1271,7 @@ ath5k_eeprom_read_pcal_info(struct ath5k
+ 	else
+ 		read_pcal = ath5k_eeprom_read_pcal_info_5111;
+ 
++
+ 	for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++) {
+ 		err = read_pcal(ah, mode);
+ 		if (err)
+--- a/drivers/net/wireless/ath5k/eeprom.h
++++ b/drivers/net/wireless/ath5k/eeprom.h
+@@ -265,15 +265,27 @@ struct ath5k_chan_pcal_info_rf5112 {
+ 	u8	pcdac_x3[AR5K_EEPROM_N_XPD3_POINTS];
+ };
+ 
++
++struct ath5k_pdgain_info {
++	u16 n_vpd;
++	u16 vpd[AR5K_EEPROM_N_PD_POINTS];
++	s16 pwr_t4[AR5K_EEPROM_N_PD_POINTS];
++};
++
+ struct ath5k_chan_pcal_info_rf2413 {
++	/* --- EEPROM VALUES --- */
+ 	/* Starting pwr/pddac values */
+-	s8		pwr_i[AR5K_EEPROM_N_PD_GAINS];
+-	u8	pddac_i[AR5K_EEPROM_N_PD_GAINS];
++	s8 pwr_i[AR5K_EEPROM_N_PD_GAINS];
++	u8 pddac_i[AR5K_EEPROM_N_PD_GAINS];
+ 	/* (pwr,pddac) points */
+-	s8		pwr[AR5K_EEPROM_N_PD_GAINS]
+-				[AR5K_EEPROM_N_PD_POINTS];
+-	u8	pddac[AR5K_EEPROM_N_PD_GAINS]
+-				[AR5K_EEPROM_N_PD_POINTS];
++	s8 pwr[AR5K_EEPROM_N_PD_GAINS]
++	      [AR5K_EEPROM_N_PD_POINTS];
++	u8 pddac[AR5K_EEPROM_N_PD_GAINS]
++	        [AR5K_EEPROM_N_PD_POINTS];
++
++	/* --- RAW VALUES --- */
++	struct ath5k_pdgain_info pdgains
++		[AR5K_EEPROM_N_PD_GAINS];
+ };
+ 
+ struct ath5k_chan_pcal_info {
diff --git a/package/mac80211/patches/340-ath5k_txpower_2413.patch b/package/mac80211/patches/340-ath5k_txpower_2413.patch
new file mode 100644
index 0000000000..7373d35530
--- /dev/null
+++ b/package/mac80211/patches/340-ath5k_txpower_2413.patch
@@ -0,0 +1,672 @@
+Implement the power curve interpolation, which is required for
+proper tx on 2413 and newer RF designs.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+--- a/drivers/net/wireless/ath5k/phy.c
++++ b/drivers/net/wireless/ath5k/phy.c
+@@ -4,6 +4,7 @@
+  * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
+  * Copyright (c) 2006-2007 Nick Kossifidis <mickflemm@gmail.com>
+  * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
++ * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+  *
+  * Permission to use, copy, modify, and distribute this software for any
+  * purpose with or without fee is hereby granted, provided that the above
+@@ -2383,31 +2384,449 @@ unsigned int ath5k_hw_get_def_antenna(st
+  */
+ 
+ /*
+- * Initialize the tx power table (not fully implemented)
++ * find the lower and upper index of the values in the table surrounding the target value
+  */
+-static void ath5k_txpower_table(struct ath5k_hw *ah,
+-		struct ieee80211_channel *channel, s16 max_power)
++static void
++ath5k_get_table_index(const u16 *tbl, unsigned int tbl_sz, u16 target,
++                      unsigned int idx[2])
+ {
+-	unsigned int i, min, max, n;
+-	u16 txpower, *rates;
++	const u16 *ti;
+ 
+-	rates = ah->ah_txpower.txp_rates;
++	if (target < tbl[0]) {
++		idx[0] = idx[1] = 0;
++		return;
++	}
++
++	if (target > tbl[tbl_sz - 1]) {
++		idx[0] = idx[1] = tbl_sz - 1;
++		return;
++	}
++
++	/* look for the surrounding values */
++	for (ti = tbl; ti < &tbl[tbl_sz - 1]; ti++) {
++
++		/* if the value is equal to the target, set lo = hi = index */
++		if (*ti == target) {
++			idx[0] = idx[1] = ti - tbl;
++			return;
++		}
++
++		/* if the target is between the current value and the next one,
++		 * set lo = cur, hi = lo + 1 */
++		if (target < ti[1]) {
++			idx[0] = ti - tbl;
++			idx[1] = idx[0] + 1;
++			return;
++		}
++	}
++}
++
++/* find the lower and upper frequency info */
++static void
++ath5k_get_freq_tables(struct ath5k_hw *ah, struct ieee80211_channel *channel,
++                     struct ath5k_chan_pcal_info **pcinfo_l,
++                     struct ath5k_chan_pcal_info **pcinfo_r,
++                     struct ath5k_rate_pcal_info *rates)
++{
++	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
++	struct ath5k_chan_pcal_info *pcinfo;
++	unsigned int idx_l, idx_r;
++	int mode, max, i;
++	unsigned int target = channel->center_freq;
++	struct ath5k_rate_pcal_info *rpinfo;
++
++	if (!(channel->hw_value & CHANNEL_OFDM)) {
++		pcinfo = ee->ee_pwr_cal_b;
++		rpinfo = ee->ee_rate_tpwr_b;
++		mode = AR5K_EEPROM_MODE_11B;
++	} else if (channel->hw_value & CHANNEL_2GHZ) {
++		pcinfo = ee->ee_pwr_cal_g;
++		rpinfo = ee->ee_rate_tpwr_g;
++		mode = AR5K_EEPROM_MODE_11G;
++	} else {
++		pcinfo = ee->ee_pwr_cal_a;
++		rpinfo = ee->ee_rate_tpwr_a;
++		mode = AR5K_EEPROM_MODE_11A;
++	}
++	max = ee->ee_n_piers[mode] - 1;
++
++	if (target < pcinfo[0].freq) {
++		idx_l = idx_r = 0;
++		goto done;
++	}
++
++	if (target > pcinfo[max].freq) {
++		idx_l = idx_r = max;
++		goto done;
++	}
++
++	/* look for the surrounding values */
++	for (i = 0; i <= max; i++) {
++
++		/* if the value is equal to the target, set lo = hi = index */
++		if (pcinfo[i].freq == target) {
++			idx_l = idx_r = i;
++			goto done;
++		}
++
++		/* if the target is between the current value and the next one,
++		 * set lo = cur, hi = lo + 1 */
++		if (target < pcinfo[i].freq) {
++			idx_l = i;
++			idx_r = idx_l + 1;
++			goto done;
++		}
++	}
++
++done:
++	*pcinfo_l = &pcinfo[idx_l];
++	*pcinfo_r = &pcinfo[idx_r];
++
++	if (!rates)
++		return;
++
++	/* rate info minimum values */
++	rates->freq = channel->center_freq;
++	rates->target_power_6to24 =
++		min(rpinfo[idx_l].target_power_6to24,
++		    rpinfo[idx_r].target_power_6to24);
++	rates->target_power_36 =
++		min(rpinfo[idx_l].target_power_36,
++		    rpinfo[idx_r].target_power_36);
++	rates->target_power_48 =
++		min(rpinfo[idx_l].target_power_48,
++		    rpinfo[idx_r].target_power_48);
++	rates->target_power_54 =
++		min(rpinfo[idx_l].target_power_54,
++		    rpinfo[idx_r].target_power_54);
++}
++
++
++/* Fill the VPD table for all indices between pmin and pmax */
++static void
++ath5k_fill_vpdtable(s16 pmin, s16 pmax, const s16 *pwr,
++                    const u16 *vpd, unsigned int intercepts,
++                    u16 vpdtable[AR5K_EEPROM_POWER_TABLE_SIZE])
++{
++	unsigned int idx[2] = { 0, 0 };
++	s16 cur_pwr = 2 * pmin;
++	int i;
++
++	if (intercepts < 2)
++		return;
++
++	for(i = 0; i <= (pmax - pmin); i++) {
++		ath5k_get_table_index(pwr, intercepts, cur_pwr, idx);
++
++		if (!idx[1])
++			idx[1] = 1;
++
++		if (idx[0] == intercepts - 1)
++			idx[0] = intercepts - 2;
++
++		if (pwr[idx[0]] == pwr[idx[1]])
++			vpdtable[i] = vpd[idx[0]];
++		else
++			vpdtable[i] = (((cur_pwr - pwr[idx[0]]) * vpd[idx[1]] +
++			                (pwr[idx[1]] - cur_pwr) * vpd[idx[0]]) /
++				           (pwr[idx[1]] - pwr[idx[0]]));
++
++		cur_pwr += 2;
++	}
++}
++
++static inline s16
++ath5k_interpolate_signed(u16 ref, u16 ref_l, u16 ref_r, s16 val_l, s16 val_r)
++{
++	if (ref_l == ref_r)
++		return val_l;
++
++	return ((ref - ref_l)*val_r + (ref_r - ref)*val_l) / (ref_r - ref_l);
++}
++
++static inline s16
++ath5k_get_min_power_2413(struct ath5k_chan_pcal_info *pcinfo)
++{
++	struct ath5k_pdgain_info *pd;
++	int i;
++
++	/* backwards - highest pdgain == lowest power */
++	for (i = AR5K_EEPROM_N_PD_GAINS - 1; i >= 0; i--) {
++		pd = &pcinfo->rf2413_info.pdgains[i];
++		if (!pd->n_vpd)
++			continue;
++
++		return pd->pwr_t4[0];
++	}
++	return 0;
++}
++
++static inline s16
++ath5k_get_max_power_2413(struct ath5k_chan_pcal_info *pcinfo)
++{
++	struct ath5k_pdgain_info *pd;
++	int i;
++
++	/* forwards: lowest pdgain == highest power */
++	for (i = 0; i < AR5K_EEPROM_N_PD_GAINS; i++) {
++		pd = &pcinfo->rf2413_info.pdgains[i];
++		if (!pd->n_vpd)
++			continue;
++
++		return pd->pwr_t4[pd->n_vpd];
++	}
++	return 0;
++}
++
++
++
++static int
++ath5k_txpower_table_2413(struct ath5k_hw *ah, struct ieee80211_channel *ch,
++                         struct ath5k_chan_pcal_info *pcinfo_l,
++                         struct ath5k_chan_pcal_info *pcinfo_r)
++{
++	struct ath5k_pdgain_info *pd_l, *pd_r;
++	u16 gain_boundaries[4];
++	u16 *xpd = ah->ah_txpower.txp_xpd;
++	int n_xpd = 0;
++	s16 pmin_t2[AR5K_EEPROM_N_PD_GAINS];
++	s16 pmax_t2[AR5K_EEPROM_N_PD_GAINS];
++	u16 *pdadc_out = ah->ah_txpower.txp_pcdac;
++	unsigned int gain_overlap;
++	unsigned int vpd_size, target_idx, max_idx;
++	unsigned int n_pdadc = 0;
++	u16 vpd_step;
++	u16 *pcdacL;
++	u16 *pcdacR;
++	int i, j, s;
++	u32 reg;
++	s16 ch_pmin, ch_pmax;
++
++	gain_overlap = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) &
++		AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP;
++
++	/* loop backwards over pdgains (highest pdgain == lowest power) */
++	for (i = AR5K_EEPROM_N_PD_GAINS - 1; i >= 0; i--) {
++		pd_l = &pcinfo_l->rf2413_info.pdgains[i];
++		pd_r = &pcinfo_r->rf2413_info.pdgains[i];
++		pcdacL = ah->ah_txpower.txp_rfdata.rf2413.pcdacL[n_xpd];
++		pcdacR = ah->ah_txpower.txp_rfdata.rf2413.pcdacR[n_xpd];
++
++		if (!pd_l->n_vpd)
++			continue;
++
++		xpd[n_xpd] = i;
++
++		pmin_t2[n_xpd] = min(pd_l->pwr_t4[0], pd_r->pwr_t4[0]) / 2;
++		pmax_t2[n_xpd] = min(pd_l->pwr_t4[pd_l->n_vpd - 1],
++			pd_r->pwr_t4[pd_r->n_vpd - 1]) / 2;
++
++		if ((u16) (pmax_t2[n_xpd] - pmin_t2[n_xpd]) > 64)
++			continue;
++
++		/* fill vpd tables for left and right frequency info */
++		ath5k_fill_vpdtable(pmin_t2[n_xpd], pmax_t2[n_xpd],
++			pd_l->pwr_t4, pd_l->vpd, pd_l->n_vpd, pcdacL);
++
++		/* check if interpolation is necessary */
++		if (pcinfo_l == pcinfo_r)
++			continue;
++
++		ath5k_fill_vpdtable(pmin_t2[n_xpd], pmax_t2[n_xpd],
++			pd_r->pwr_t4, pd_r->vpd, pd_r->n_vpd, pcdacR);
++
++		/* interpolate pcdac values,
++		 * reuse pcdacL table for interpolation output */
++		for (j = 0; j < (u16) (pmax_t2[n_xpd] - pmin_t2[n_xpd]); j++) {
++			pcdacL[j] = ath5k_interpolate_signed(ch->center_freq,
++					pcinfo_l->freq, pcinfo_r->freq,
++					(s16) pcdacL[j], (s16) pcdacR[j]);
++		}
++		n_xpd++;
++	}
++
++	if (!n_xpd)
++		return 0;
++
++	/* create final table */
++	for (i = 0, n_pdadc = 0; i < n_xpd; i++) {
++		pcdacL = ah->ah_txpower.txp_rfdata.rf2413.pcdacL[i];
++
++		if (i == n_xpd - 1) {
++			/* 2 db boundary stretch */
++			gain_boundaries[i] = pmax_t2[i] + 4;
++		} else {
++			gain_boundaries[i] = (pmax_t2[i] + pmin_t2[i + 1]) / 2;
++		}
++
++		if (gain_boundaries[i] > AR5K_TUNE_MAX_TXPOWER)
++			gain_boundaries[i] = AR5K_TUNE_MAX_TXPOWER;
++
++		/* find starting index */
++		if (i == 0)
++			s = 0;
++		else
++			s = (gain_boundaries[i - 1] - pmin_t2[i]) -
++				gain_overlap;
++
++		if (pcdacL[1] > pcdacL[0])
++			vpd_step = pcdacL[1] - pcdacL[0];
++		else
++			vpd_step = 1;
++
++		/* if s is below 0, we need to extrapolate below this pdgain */
++		while ((s < 0) && (n_pdadc < 128)) {
++			s16 tmp = pcdacL[0] + s * vpd_step;
++			pdadc_out[n_pdadc++] = (u16) ((tmp < 0) ? 0 : tmp);
++			s++;
++		}
++
++		vpd_size = pmax_t2[i] - pmin_t2[i];
++		target_idx = gain_boundaries[i] + gain_overlap - pmin_t2[i];
++		max_idx = (target_idx < vpd_size) ? target_idx : vpd_size;
++
++		while ((s < (s16) max_idx) && (n_pdadc < 128))
++			pdadc_out[n_pdadc++] = pcdacL[s++];
++
++		/* need to extrapolate above this pdgain? */
++		if (target_idx <= max_idx)
++			continue;
++
++		if (pcdacL[vpd_size - 1] > pcdacL[vpd_size - 2])
++			vpd_step = pcdacL[vpd_size - 1] - pcdacL[vpd_size - 2];
++		else
++			vpd_step = 1;
++
++		while ((s < (s16) target_idx) && (n_pdadc < 128)) {
++			int tmp = pcdacL[vpd_size - 1] +
++				(s - max_idx) * vpd_step;
++			pdadc_out[n_pdadc++] = (tmp > 127) ? 127 : tmp;
++			s++;
++		}
++	}
++
++	while (i < AR5K_EEPROM_N_PD_GAINS) {
++		gain_boundaries[i] = gain_boundaries[i - 1];
++		i++;
++	}
++
++	while (n_pdadc < 128) {
++		pdadc_out[n_pdadc] = pdadc_out[n_pdadc - 1];
++		n_pdadc++;
++	}
++
++	/* select the right xpdgain curves */
++	reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1);
++	reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 |
++	         AR5K_PHY_TPC_RG1_PDGAIN_2 |
++	         AR5K_PHY_TPC_RG1_PDGAIN_3 |
++		 AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
++	reg |= AR5K_REG_SM(n_xpd, AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
++	switch(n_xpd) {
++	case 3:
++		reg |= AR5K_REG_SM(xpd[2], AR5K_PHY_TPC_RG1_PDGAIN_3);
++		/* fall through */
++	case 2:
++		reg |= AR5K_REG_SM(xpd[1], AR5K_PHY_TPC_RG1_PDGAIN_2);
++		/* fall through */
++	case 1:
++		reg |= AR5K_REG_SM(xpd[0], AR5K_PHY_TPC_RG1_PDGAIN_1);
++		break;
++	}
++	ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1);
+ 
+-	txpower = AR5K_TUNE_DEFAULT_TXPOWER * 2;
+-	if (max_power > txpower)
+-		txpower = max_power > AR5K_TUNE_MAX_TXPOWER ?
+-		    AR5K_TUNE_MAX_TXPOWER : max_power;
++	/*
++	 * Write TX power values
++	 */
++	reg = AR5K_PHY_PCDAC_TXPOWER_BASE_2413;
++	for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
++		ath5k_hw_reg_write(ah,
++			((pdadc_out[4*i + 0] & 0xff) << 0) |
++			((pdadc_out[4*i + 1] & 0xff) << 8) |
++			((pdadc_out[4*i + 2] & 0xff) << 16) |
++			((pdadc_out[4*i + 3] & 0xff) << 24), reg);
++		reg += 4;
++	}
++
++	ath5k_hw_reg_write(ah,
++		AR5K_REG_SM(gain_overlap,
++			AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) |
++		AR5K_REG_SM(gain_boundaries[0],
++			AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) |
++		AR5K_REG_SM(gain_boundaries[1],
++			AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) |
++		AR5K_REG_SM(gain_boundaries[2],
++			AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) |
++		AR5K_REG_SM(gain_boundaries[3],
++			AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4),
++		AR5K_PHY_TPC_RG5);
++
++	ah->ah_txpower.txp_offset = pmin_t2[0];
++
++	/* look up power boundaries for this channel */
++	ch_pmin = ath5k_get_min_power_2413(pcinfo_l);
++	ch_pmax = ath5k_get_max_power_2413(pcinfo_l);
++
++	if (pcinfo_l != pcinfo_r) {
++		s16 pwr_r;
++
++		pwr_r = ath5k_get_min_power_2413(pcinfo_r);
++		ch_pmin = ath5k_interpolate_signed(ch->center_freq,
++					pcinfo_l->freq, pcinfo_r->freq,
++					ch_pmin, pwr_r);
++
++		pwr_r = ath5k_get_max_power_2413(pcinfo_r);
++		ch_pmax = ath5k_interpolate_signed(ch->center_freq,
++					pcinfo_l->freq, pcinfo_r->freq,
++					ch_pmax, pwr_r);
++	}
++	ah->ah_txpower.txp_min = ch_pmin;
++	ah->ah_txpower.txp_max = ch_pmax;
+ 
+-	for (i = 0; i < AR5K_MAX_RATES; i++)
+-		rates[i] = txpower;
++	return 0;
++}
+ 
+-	/* XXX setup target powers by rate */
++static void
++ath5k_setup_rate_table(struct ath5k_hw *ah, u16 max_pwr,
++                       struct ath5k_rate_pcal_info *rate_info)
++{
++	unsigned int i;
++	u16 *rates;
++
++	max_pwr *= 2;
++	max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max);
+ 
++	/* apply rate limits */
++	rates = ah->ah_txpower.txp_rates;
++	for (i = 0; i < 5; i++) {
++		rates[i] = min(max_pwr, rate_info->target_power_6to24);
++	}
++	rates[5] = min(rates[0], rate_info->target_power_36);
++	rates[6] = min(rates[0], rate_info->target_power_48);
++	rates[7] = min(rates[0], rate_info->target_power_54);
++	rates[8] = min(rates[0], rate_info->target_power_6to24);
++	rates[9] = min(rates[0], rate_info->target_power_36);
++	rates[10] = min(rates[0], rate_info->target_power_36);
++	rates[11] = min(rates[0], rate_info->target_power_48);
++	rates[12] = min(rates[0], rate_info->target_power_48);
++	rates[13] = min(rates[0], rate_info->target_power_54);
++	rates[14] = min(rates[0], rate_info->target_power_54);
++
++	ah->ah_txpower.txp_tpc = max_pwr;
+ 	ah->ah_txpower.txp_min = rates[7];
+-	ah->ah_txpower.txp_max = rates[0];
+-	ah->ah_txpower.txp_ofdm = rates[0];
++	ah->ah_txpower.txp_max = min(ah->ah_txpower.txp_max,
++		(s16) rate_info->target_power_36);
++	ah->ah_txpower.txp_ofdm = ah->ah_txpower.txp_max;
++}
++
++static int
++ath5k_txpower_table(struct ath5k_hw *ah, struct ieee80211_channel *ch,
++                    struct ath5k_chan_pcal_info *pcinfo_l,
++                    struct ath5k_chan_pcal_info *pcinfo_r,
++					u16 max_pwr)
++{
++	unsigned int i, min, max, n;
+ 
+-	/* Calculate the power table */
+ 	n = ARRAY_SIZE(ah->ah_txpower.txp_pcdac);
+ 	min = AR5K_EEPROM_PCDAC_START;
+ 	max = AR5K_EEPROM_PCDAC_STOP;
+@@ -2418,51 +2837,64 @@ static void ath5k_txpower_table(struct a
+ #else
+ 		min;
+ #endif
++
++	/*
++	 * Write TX power values
++	 */
++	for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
++		ath5k_hw_reg_write(ah,
++			((((ah->ah_txpower.txp_pcdac[(i << 1) + 1] << 8) |
++				0xff) & 0xffff) << 16) |
++			 (((ah->ah_txpower.txp_pcdac[(i << 1)    ] << 8) |
++				0xff) & 0xffff),
++			AR5K_PHY_PCDAC_TXPOWER(i));
++	}
++	return 0;
+ }
+ 
++
+ /*
+  * Set transmition power
+  */
+-int /*O.K. - txpower_table is unimplemented so this doesn't work*/
++int
+ ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
+ 		unsigned int txpower)
+ {
++	struct ath5k_chan_pcal_info *pcinfo_l, *pcinfo_r;
++	struct ath5k_rate_pcal_info rate_info;
+ 	bool tpc = ah->ah_txpower.txp_tpc;
+-	unsigned int i;
+ 
+ 	ATH5K_TRACE(ah->ah_sc);
+ 	if (txpower > AR5K_TUNE_MAX_TXPOWER) {
+ 		ATH5K_ERR(ah->ah_sc, "invalid tx power: %u\n", txpower);
+ 		return -EINVAL;
+ 	}
+-
+-	/*
+-	 * RF2413 for some reason can't
+-	 * transmit anything if we call
+-	 * this funtion, so we skip it
+-	 * until we fix txpower.
+-	 *
+-	 * XXX: Assume same for RF2425
+-	 * to be safe.
+-	 */
+-	if ((ah->ah_radio == AR5K_RF2413) || (ah->ah_radio == AR5K_RF2425))
+-		return 0;
++	if (txpower == 0)
++		txpower = AR5K_TUNE_MAX_TXPOWER;
+ 
+ 	/* Reset TX power values */
+ 	memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
+ 	ah->ah_txpower.txp_tpc = tpc;
++	ah->ah_txpower.txp_min = 0;
++	ah->ah_txpower.txp_max = AR5K_TUNE_MAX_TXPOWER;
+ 
+-	/* Initialize TX power table */
+-	ath5k_txpower_table(ah, channel, txpower);
++	/* find matching frequency info */
++	ath5k_get_freq_tables(ah, channel, &pcinfo_l, &pcinfo_r, &rate_info);
++	ath5k_setup_rate_table(ah, txpower, &rate_info);
+ 
+-	/*
+-	 * Write TX power values
+-	 */
+-	for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
+-		ath5k_hw_reg_write(ah,
+-			((((ah->ah_txpower.txp_pcdac[(i << 1) + 1] << 8) | 0xff) & 0xffff) << 16) |
+-			(((ah->ah_txpower.txp_pcdac[(i << 1)    ] << 8) | 0xff) & 0xffff),
+-			AR5K_PHY_PCDAC_TXPOWER(i));
++	/* Initialize TX power table */
++	switch(ah->ah_radio) {
++	case AR5K_RF2413:
++	case AR5K_RF5413:
++		ath5k_txpower_table_2413(ah, channel, pcinfo_l, pcinfo_r);
++		break;
++	case AR5K_RF2425:
++		/* unimplemented */
++		return 0;
++	default:
++		/* Default power table */
++		ath5k_txpower_table(ah, channel, pcinfo_l, pcinfo_r, txpower);
++		break;
+ 	}
+ 
+ 	ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
+@@ -2481,12 +2913,19 @@ ath5k_hw_txpower(struct ath5k_hw *ah, st
+ 		AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
+ 		AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
+ 
+-	if (ah->ah_txpower.txp_tpc)
++	if (ah->ah_txpower.txp_tpc) {
+ 		ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
+ 			AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
+-	else
++
++		ath5k_hw_reg_write(ah,
++			AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) |
++			AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) |
++			AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP),
++			AR5K_TPC);
++	} else {
+ 		ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX |
+ 			AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
++	}
+ 
+ 	return 0;
+ }
+--- a/drivers/net/wireless/ath5k/ath5k.h
++++ b/drivers/net/wireless/ath5k/ath5k.h
+@@ -207,7 +207,7 @@
+ #define AR5K_TUNE_CWMAX_11B			1023
+ #define AR5K_TUNE_CWMAX_XR			7
+ #define AR5K_TUNE_NOISE_FLOOR			-72
+-#define AR5K_TUNE_MAX_TXPOWER			60
++#define AR5K_TUNE_MAX_TXPOWER			63
+ #define AR5K_TUNE_DEFAULT_TXPOWER		30
+ #define AR5K_TUNE_TPC_TXPOWER			true
+ #define AR5K_TUNE_ANT_DIVERSITY			true
+@@ -1115,11 +1115,23 @@ struct ath5k_hw {
+ 	struct ath5k_gain	ah_gain;
+ 	u32			ah_offset[AR5K_MAX_RF_BANKS];
+ 
++
+ 	struct {
+-		u16		txp_pcdac[AR5K_EEPROM_POWER_TABLE_SIZE];
++		union {
++			struct {
++				/* Temporary PCDAC tables for interpolation */
++				u16 pcdacL[AR5K_EEPROM_N_PD_GAINS]
++					[AR5K_EEPROM_POWER_TABLE_SIZE];
++				u16 pcdacR[AR5K_EEPROM_N_PD_GAINS]
++					[AR5K_EEPROM_POWER_TABLE_SIZE];
++			} rf2413;
++		} txp_rfdata;
++		u16		txp_xpd[AR5K_EEPROM_N_XPD_PER_CHANNEL];
++		u16		txp_pcdac[AR5K_EEPROM_POWER_TABLE_SIZE * 2];
+ 		u16		txp_rates[AR5K_MAX_RATES];
+ 		s16		txp_min;
+ 		s16		txp_max;
++		s16		txp_offset;
+ 		bool		txp_tpc;
+ 		s16		txp_ofdm;
+ 	} ah_txpower;
+--- a/drivers/net/wireless/ath5k/reg.h
++++ b/drivers/net/wireless/ath5k/reg.h
+@@ -1549,6 +1549,15 @@
+ 
+ 
+ /*===5212 Specific PCU registers===*/
++#define AR5K_TPC			0x80e8
++#define AR5K_TPC_ACK			0x0000003f	/* ack frames */
++#define AR5K_TPC_ACK_S			0
++#define AR5K_TPC_CTS			0x00003f00	/* cts frames */
++#define AR5K_TPC_CTS_S			8
++#define AR5K_TPC_CHIRP			0x003f0000	/* chirp frames */
++#define AR5K_TPC_CHIRP_S		16
++#define AR5K_TPC_DOPPLER		0x0f000000	/* doppler chirp span */
++#define AR5K_TPC_DOPPLER_S		24
+ 
+ /*
+  * XR (eXtended Range) mode register
+@@ -2578,6 +2587,12 @@
+ #define	AR5K_PHY_TPC_RG1		0xa258
+ #define	AR5K_PHY_TPC_RG1_NUM_PD_GAIN	0x0000c000
+ #define	AR5K_PHY_TPC_RG1_NUM_PD_GAIN_S	14
++#define AR5K_PHY_TPC_RG1_PDGAIN_1	0x00030000
++#define AR5K_PHY_TPC_RG1_PDGAIN_1_S	16
++#define AR5K_PHY_TPC_RG1_PDGAIN_2	0x000c0000
++#define AR5K_PHY_TPC_RG1_PDGAIN_2_S	18
++#define AR5K_PHY_TPC_RG1_PDGAIN_3	0x00300000
++#define AR5K_PHY_TPC_RG1_PDGAIN_3_S	20
+ 
+ #define	AR5K_PHY_TPC_RG5			0xa26C
+ #define	AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP	0x0000000F
+--- a/drivers/net/wireless/ath5k/desc.c
++++ b/drivers/net/wireless/ath5k/desc.c
+@@ -194,6 +194,10 @@ static int ath5k_hw_setup_4word_tx_desc(
+ 		return -EINVAL;
+ 	}
+ 
++	tx_power += ah->ah_txpower.txp_offset;
++	if (tx_power > AR5K_TUNE_MAX_TXPOWER)
++		tx_power = AR5K_TUNE_MAX_TXPOWER;
++
+ 	/* Clear descriptor */
+ 	memset(&desc->ud.ds_tx5212, 0, sizeof(struct ath5k_hw_5212_tx_desc));
+